Whether the slim is better than the fat really depends on your love of homebrew apps (among a whole lot of other reasons). A while ago you couldn't run homebrew that required FW v 1.5, but I believe Dark Alex's time machine fixes that. Some slims are unhackable so it is not recommend by me to buy one from a store (As they will probably be newer ones which have the TA88V3 mobo). If I am missing any outstanding reasons, I'm sure other members will add to what I've said (or correct it for that matter). I personally like the slim because it is, well, smaller. It has more RAM, though I'm not sure if it is really utilized by homebrew or games right now, and has SKYPE functionality (you can use it as a phone). I also like the insides better.