What should I get on my new psp slim?

Ok, first off I know I need to use a Jigkick or whatever to upgrade to custom firmware. I guess I'll just buy a battrey on ebay. I haven't been into homebrew for like 6 months (My old fat psp was stolen). What are the best emulators for N64, SNES, NES, etc... Also what are some good apps that I should put on it?