Hello Have a look this article from here you can get the idea about the countertop surface with under mount sinks along with their cost. Might be it help you choose countertops. Through this article you can also get the info about granite, quartz, cement, Tile and etc. type of countertops. I hope it helps you. http://porch.com/advice/countertops-101/

Fastest and easiest? Hire a great pro. If not that, I'm not sure there's a fast and easy option unless you're super disciplined about decision making. Here's what I did, roughly, and my tile guy and salesperson said I was faster than most, and the bathrooms look good. Not perfect. But we're happy with them. Since you've selected fixtures and vanities you like, prioritize your considerations. What matters most to you? Aesthetics? Function? Maintenance? Budget? Make a list. Ruthlessly eliminate products that don't fit your criteria. Narrow color and material choices to three for tile, three for counters. Go look. Limit time in stores/showrooms to no more than half an hour (okay, maybe an hour if you've got multiple rooms) at a time. Set a timer. Bring home samples. They probably won't be the ones you thought you'd like. Repeat this process up to three times until you get something that looks good. If you can't find anything you like, hire the pro. Remember: There is no One True Choice. Suspecting there is leads to trials and tribulation. Do not take this path. We're doing four new bathrooms in a massive remodel. The way this process worked in the master bath my husband will use went like this. For the countertops, maintenance and function are most important to us. He's a bad splasher and a bad cleaner. Never sees water spots or that blob of shaving cream he spilled. So counters can't etch or stain. Quartz fits the bill and our budget. He wants white. Not my first color choice, but easy enough. Same will work in guest bathroom and laundry room, thus making efficient use of slabs. Pick the most reasonably priced quality product in the store giving me the nice discount. Be thorough with research, but don't over analyze. Set a deadline for your decision. Stick to it. We chose tile at the same time. Budget was important here, as well as maintenance. DH said he wanted something that looked like a "Roman" bathroom. I interpreted this as marble. No. Not going there with his spilling habit, aversion to wiping things down and cleaning in general. So porcelain or ceramic tile. Fewer grout lines=fewer cleaning woes. I told all this to my salesperson and she immediately directed me to an inexpensive fake carrarra-looking ceramic 18"x18" tile. Works for shower walls. We were going to use it for the floor, too, but a last minute substitution floor tile in another bathroom allowed us to use a grey stone-looking porcelain 12"x24" instead. The contrast looks nice. And we sold the extra 18"x18" to a friend. I started out loving Ann Sacks tiles and New Ravenna mosaics the most, but really, I love tile. The colors, the textures, the possibilities! I could look for hours and imagine all sorts of looks. Then, like everyone else, I had to make real life choices I could live with and afford in the midst of selection fatigue. My salesperson at the tile store was a huge help in narrowing contenders. I found her by looking at Yelp reviews, then went to meet her. She listened well and she knew her products. Great combination, and so helpful. Sorry for the dissertation, when you asked for a nugget. Good luck on your selections. Are you going to post them for us to look at?

I have the same layout in my bath and all my samples looked much darker when I brought them inside. It was very frustrating. My first reaction was that the floor is too similar to the hardwood. I also don't like the taupey purple undertone, which is very common in gray tiles. I would not use a stone-look at all with those more cottage-y tub tiles as the styles are very different. I think it's too much pattern for a modest bathroom so I'd look for a very subtle pattern, maybe something in a linen look if you want to use a large format tile. Kohler has the Ceramic Impressions line of countertop with integrated sink, but they come in standard sizes. Here is an old thread of mine with photos. [https://www.houzz.com/discussions/what-do-you-think-of-the-kohler-impressions-ceramic-countertops-sink-dsvw-vd~3433846[(https://www.houzz.com/discussions/what-do-you-think-of-the-kohler-impressions-ceramic-countertops-sink-dsvw-vd~3433846)

Egan-I would reduce island length by around 12”. I would eliminate pony walls on ends and use decorative cabinet end panels and reduce 18” cabinet on far end to 12” cabinet. Make sure your cabinets are designed with proper metal support plates for slab. 12-13” overlay for stools is tight. I would expand to 16”. Most slabs can accommodate that total width. 36” deep plus 4” more would mean slab has to be 40-44” wide and 108-112” long. That is doable for most slabs without seams.