You do not want a MW over the oven. You need a range hood. What kind of cooktop are you planning on? Gas? Induction? Electric? #2 is definitely better except I'd move the prep sink in from the edge a bit. This way you can stack your foods to the left, wash them and put the washed foods to the right of the prep sink. The way you have it you can't do that.

cpartist, I'm leaning towards Plan 2 so far unless there's something faulty with Plan 2 so the microwave will NOT be above the cook top. And we'll be getting a gas cook top. I agree with your comment on the prep sink. How much is recommended on the side? I want to have lot of uninterrupted space to the right.

You could look at sinks with an integral drainboard. I think elkay makes some. There's also the kohler stages sinks with the shelf, but those are bigger than the sizes you are looking at.

You could dedicate the upper cabinet to the left as a dish drying cabinet.

Google search--dish drying cabinets

This isn't really what you asked, but what about a sink that can fit some drying inside, so it's not always on the counter? Not sure how much you need to dry vs dishwasher etc, but what about this kind of sink? :

Sofisticated Soth Tampa Kitchen · More Info

I have a dishwasher but I also rinse recyclables (a lot) and always have a few hand washables. I have a pretty wood dish drainer on the counter with a pretty towel underneath. My sink is 36 inches, so on one side I have a Simplehuman dishdrainer with sides. Rinsed recyclables go there because if they get splashed a little it is not big deal. There is still plenty of room in the sink. Hear is my sink and wood dish drainer. The simple human drainer is not in the pic. The drain is in the right corner.

https://www.houzz.com/photos/my-pics-work-in-progress-phvw-vp~58831076

This is the dish drainer I keep in the sink far to the left.

http://www.simplehuman.com/plastic-compact-dishrack-white?gclid=Cj0KEQjwjem-BRC_isGJlJ-0h-MBEiQAbCimWF9JjsxPjS0nzcHvEOdhZtvi9dFhH4FU-jwjDwZeKKMaApCF8P8HAQ

Some people with my sink get the grill for the bottom and set rinsed items right on the grill far to the left away from the sink drain. Before I had this sink I had a two bowl sink and kept a dish drainer in one bowl.

Also, a single handle faucet possibly with the handle pulled to the front like mine will not interfere with the window.

I don't know what your budget is but Julien makes sinks with integrated stainless drain boards. Also Kohler has several sinks such as the Prolific and Stages with various drainage accessories and integrated drain boards.

Another vote for a sink with an integrated drainboard. Looks and works better than runnels and no warranty issues.

I've looked into sinks that comes with an integrated drain board, the problem is the sink bowl is quite small. I want the sink bowl to be about 30" and then extra space for the drain board. Maybe such a thing doesn't exist?

As for the Kohler prolific, I don't know how this would work for us since we need to have the draining trays in place which would cut into the work space of the sink bowl.

We run the dish washer in the night. So most dishes and plates will be put into the DW right after use. But the cups, mugs and cutlery tends to be used and rinsed and goes on the draining rack all the times, large pans are washed and goes on the rack too.

In that case, I'd get a couple of folding cooling racks (Pampered Chef sells a good one) to put in the sink, for the rinsed cups, mugs, and cutlery. The pans are probably not draining at the same time, but you could stack the racks when necessary.

Folding, stackable cooling rack

Have a custom shop fab a drainboard onto a sink that you like. It won't be cheap, but you're going to be looking at this and using it for a very long time.

A 30" single sink is pretty big. Many people would be able to put a roll out drying mat such as this one over half the sink with plenty of room to rinse on the other side.

https://www.amazon.com/Better-Houseware-Roll-Up-Drying-1434/dp/B00HET3GEW/ref=sr_1_1?s=home-garden&ie=UTF8&qid=1474121290&sr=1-1&keywords=roll+out+drying+mat

The issue with putting a 12" or 15" drainboard on a 30" sink is that most manufacturers are going recommend a 45" or 48" base cabinet. Putting the drain board over the dishwasher is not recommended because it might not fit. It might be doable but requires a lot of measuring, planning, and careful selection of the right dishwasher, countertop, and sink.

Stan Z, I understand it's difficult to have the drain board over the dishwasher. But can we do it the other way, can we have a set of drawers under the drain board section?

I saw this Blanco 516216 and the bowl is 30" and a big drain board. I don't want to waste a cabinet for it but if we could have drawers underneath the drain board it might solve the issue for me.

Blanco recommends a 54" base cabinet for that sink. If you like the concept (and are OK with the cost) you should also look at Julien who does custom sizes.

If you want to put the drain board over adjacent drawers you would need to work closely with your kitchen designer, cabinet maker, and counter top installer. It might be possible if you adjust (or block off) the top drawer plus make adjustments to the sides of the sink and drawer base cabinets. You'll need to have the countertop fabricator make sure the whole thing is supported properly. It's not impossible -- but requires a lot of coordination BEFORE cabinets are ordered. Your team of designer/contractors will need to evaluate your specific situation and let you know what they can do. They may be nervous about it but I think they will be more comfortable putting it over drawers than over the dishwasher.

As for the Kohler prolific, I don't know how this would work for us since we need to have the draining trays in place which would cut into the work space of the sink bowl.

We run the dish washer in the night. So most dishes and plates will be put into the DW right after use. But the cups, mugs and cutlery tends to be used and rinsed and goes on the draining rack all the times, large pans are washed and goes on the rack too.

Since the Prolific has the 3 ledges and comes with 2 drying racks, you get more draining room than just the width of the rack. With the racks to the side, the sink is still 21.5" wide, and it is very easy to use to clean things on one side, while other things are drying on the racks. I don't find that it cuts into the workspace at all. I have even cleaned large pans on the bottom of the sink while things were drying on the racks higher up. I can move the rack to the middle of the sink and dry a big pan there if necessary.

It is very flexible and big at 33". You might try to see it in a showroom so you can see if it could work for you.

If you don't like that sink, I think there are some posts here talking about how people fit the Stages sink into their cabinets and that might help you figure out how to use one of the larger sinks with an integrated drainboard. I agree with Stan that you need to figure that all out carefully before you do anything.