I myself am in the same dilemma. I can't decide between the 4s, ThunderBolt, or the Bionic. From what I've read the battery life on the 4s is still an issue so that might not solve your problem. If I had a Mac I'd prob get the 4s. How do you like the Android OS for being an MP3 player? I'd like to not carry an MP3 player and a phone as well and I think that might turn me to the 4S for those reasons.