tcarswell is right, Jag will get too big for a 12" turning space. they get at least 12 inches long, pbass is will get WAY too big in too little time. Im gonna go with Chad, get a single red devil. they are notoriously aggressive.
A 65 would make a good African Cichlid tank, and they can be quite fun to have. If you want something more predatory you need a much bigger tank. Your best bet is to wait till you have the bigger tank to prevent a poor habitat in the very good chance the fish will out grow that 65 way before you have the larger one...Lesson Learned lol.