Don't bench everyday. Work on all your muscle groups or regret it in a few years. If you're concerned only with benching big numbers then just lie to people about what your max is.
Search for a thread called "The straight dope on BELTS". It will answer your questions. Honestly, it doesn't sound like you need one. I'll only ever use one if I'm going for a max lift I'm unsure...
I hate when I'm doing leg presses and it makes me fart. Since I have headphones in I think I'm letting out a silent but in real life I just rumbled the whole gym.