i agree with the previous sentiments that you need a more controlled driver and some less stable mids. I think something in the lines of a Mako or Coyote for more finese shots from 200' to 300' would be a good addition. You might also want to throw in a skeeter or spider for an all purpose disc.
As far as your putter, have you tried the dart? It flies as straight but doesn't float as much as the aero. If you're a big fan of the rhyno and like the putting style you get with that i'd try out a pig as well. Another putter to try out would be the classic roc which is a shorter range roc.