Making the Move to EVO

[Tonedabone2196]

Ok, so I got tired of my HERO, and I just received my EVO from Radio Shack $99 thank u very much. I have a few questions for my fellow EVO owners.
1. Does the cyanogenmod 6.1.1 have 4g ability?
2. After rooting, is there a "radio" I need to update?
3. Has anyone experienced a better ROM than CM 6.1.1?
4. I have heard grumblings about battery life. Does the CM 6.1.1 extend it any? Should I get a different battery? and if yes, which?
I know there are a lot of questions here, I do apologize for the length. I thank in advance everyone that responds.=D>