Wow...I just threw up...Here is the most painfully useful website on the Internet.
It calculates expected salary change in new area and change in disposable income based on cost of living in the new area. Instantly feel like a fool for staying here in NY.
I'll go ahead and ruin the surprise. Based on a $100k salary here in NY, moving to just about any other area in the country (obvious liberal cesspools excluded of course) you end up with about $30k extra in your pocket.