[Q] Best ROM for Infuse 4G?

Hi, i would like to upgrade my infuse currently running with a 2.2.1 android version.
I have a couple of questions for you:
1) can you suggest me a stable rom for my device? I want to use it it as a simple media player for internet, video, music and skype calls.
2) can you please suggest me a sw to backup my original rom?

Thanks