Well, narrow it down by what you want it to do and how much you have to spend. Personally, I do some gaming and like 4-speaker surround for run-n-gun stuff like Quake, but like to easily switch over to headphones for stuff like Ghost Recon where you really need to use your ears. The GUI for the TBSC allows you to make this switch instantly. I don't do any A/V stuff with it, so didn't need RC outs or anything like that.
Fausto