Help me choose a new Sprint phone

[Amamba]

I am looking for opinions on my Sprint upgrade. I stuck with Windows phones since 2001 but after M$ pulled the plug on the essential WM services while most users were still under contract, I can't trust them anymore. So, assuming Sprint would get an iPhone 5 this September, which phone would you recommend and why ? Evo 3G vs Galaxy vs Iphone 4 vs iPhone 5. I want stability, speed, functionality (communication, office apps, multimedia, note taking, good phone / video would. be nice) basically using it as a mini computer), good battery life. I don't play games so they don't matter. I am not afraid to flash custom ROMs. Android seems more attractive because of customizable everything, but I also like the way everything on the iPhone just works, and I like Siri.

So what do you think ? I am eligible now but can wait.