Last Minute Scramble....What Should I Buy?!

Alright, so here's the story. After hating my Blackberry since the first week after my upgrade I want an Android- now. My upgrade is on Wednesday and I'm in a panic to determine what phone will be the most "future-proof". Due to the fact that I'm the only one competent enough in my entire family, I don't have anyone to have an intelligent conversation comparing and contrasting the various Android phones on the market, currently. However, I do have you lovely people at The Verge to aid me in this important 2-year decision. I'm considering either the HTC Evo 4G LTE, GS3, or Galaxy Nexus. Additionally, I'm (unfortunately) on Sprint, so please only reply with Sprint phones. I definitely want an Android, but I'm at a stand-still.

If you would like the full story of what I know about each phone or my opinions of them, please read a few of my blog posts here: http://androidquagga.blogspot.com/.

Thanks in advance!