Well, do you want one that can play from hard drive? If so, get ps3 slim, as superslim isn't able to do that yet... There is a ODE (Optical Drive Emulator) coming out sometime soon (hopefully), and that will work with all PS3 models. Also, for entertainment centers, if you do have one, and the PS3 superslim is in it, it's going to be hard to put games in it, since it is a top loader.
I use only discs i Do not use the PSN I read that superslim ssd uses a faster and better is this true? ((I do not speak much English))