In addition to the suggestions you get here, you might want go to the major paint stores in your area and pick up brochures with their exterior paint ideas. You can also find them on-line. Also try posting this on the Home Decorating forum. Here is a link that might be useful: Ben Moore exterior paint ideas

I really like the fairview too, but on my monitor, it looks like the 2nd floor porch is done in a lighter colour. I would do it the same as the rest of the body, otherwise it is going to be emphasized and I think you want it to blend rather than stick out. I would also reconsider the light trim on the porch - could you do a mockup of it all in the fairview?

I have a 'real' stone home. The walls are about 12" thick. You need to build the jam up with the wood of your choice - cedar / redwood / pine / pressure treated. If you want, wrap it with aluminum. The sides of my jam are pine, and painted white, the same color as the door. You may be able to use a stair tread for a sill. The entrance door swings into your living space, the storm door swings out, and there is about an 6" - 8" space between the door and the storm door. My sill is a 2x10 pressure treated, and I stained it.

Based on what I'm seeing in your elevation drawings I would lean more towards keeping it simple and clean. With stucco you can go with just about any color. If you're interested in seeing some virtual finishes on your house to help you narrow your focus, check out my web site, Creative Visual Concepts. I've attached a couple of projects where I used their elevation drawings to mock up the finished product. Neither of these are more "modern" but I was providing them with finishes that they wanted to see. The last photo is their actual house finished.