If you have the space, and you are willing to spend a pretty penny on food, I would definitely recommend pbass. They are lightning quick, and they definitely have a puppy dog mentality. They are not as aggressive as most of the other large cichlids, and they are very colorful as adults. I'm very happy with the four that I have and I think I'd like to get four more.
As far as feeding goes, my larger pair (currently 10" and 12") eat whole shrimp, smelt, and a variety of other small frozen fish that I find at a local Vietnamese grocery store. And of course, they get an occasional meal of large feeder goldfish on occasion too. But that is as much for my enjoyment as it is there's. My smaller pair (roughly 4") are eating frozen krill and frozen plankton. Some here have also been able to get their's to eat pellets.