I use give-me-ltc.com and litebonk.com. I don't pool hop, but this at least gives me the option to use another pool if one happens to be down.

GUIminer -scrypt is the way to go. CPU mining isn't really profitable, a pretty common setup is using the 7950's in an open case setup. Just do a search for "7950 rig" and you should find a bunch of helpful stuff.