Hmm, well. I would go for a PS3 Slim, most definitely. How much GB you want on it is up to you. If you have an HDTV, I would get an HDMI cable for sure. The less lag, the better. If you plan on doing a lot of online gaming, you should probably get an ethernet cable as well. If you're going to be doing a lot of multiplayer, you might want to pick up an extra controller.
As for sticks, that's a mixed lot. If you're modding the buttons/stick, go for a Mad Catz SE. If you want a basic good stick that you don't have to mod, go for a Hori Fighting Stick. If you're not sure if you want to mod, and you have a little extra cash, get a HRAP or a Mad Catz TE. Art mods are a different story altogether, but not difficult for any of them. Also, different sticks have different types of buttons, thus different levels of sensitivity.