For starters congratulations on your decision to be buying a home in a very good market to be a purchaser. I agree with what Justin says about greatschools.org there is some good information on there that can link you to even greater detail. I will say I believe your search is very broad, not just because I work the I-35 corridor primarily, but believe a commute from the Plano / Frisco area during normal commute times may be a little unpredictable to say the least.
Out of the areas you mentioned, I believe almost everyone would agree the Coppell area is going to give you the highest rated schools, but the inventory there is much smaller, the prices and the property taxes are driven in a big part by those schools. In other words people are willing to pay more in order to get those schools.
I would suggest you add Highland Village to that mix, both elementary schools have exemplary ratings, the middle school is primarily Briarhill Middle School, and the high school is Marcus. A big part of the Flower Mound students also attend Marcus for high school.
Hope this helps and feel free to contact me anytime if I can help in any way.
You can check out all these listings in the areas I have suggested here.