I need help with Sprint, can someone look it up for me?

I want to switch from AT&T to Sprint but I'm not sure about money (costs)... My friend told me that a plan with 2 people and unlimited everything (Data, Talk, Text) will be 80 bucks... I looked it up and ended with a total of 190 bucks... Can someone please look this up and tell me the grand total, btw, Should I get the HTC Evo 4g White, or should I get the HTC Evo Shift? thanks!!!