L.L.
As a Realtor in McKinney who works in the Prosper area as well I get asked that question all the time. Really what it boils down to is your life style and what you are looking for. Prosper has some of the top rated schools in the area. If you have kids and are looking for smaller schools especially high school then this is the place for you.
Here is a link to the recent news on the Dallas Tollway expansion:
http://www.nbcdfw.com/traffic/transit/Road-to-Riches-Will...