I think a slightly more agile low wing plane would be a lot of fun for you to try next. The previously mentioned Tower Hobbies Kaos .40 ARF is an excellent choice. You should also seriously consider the Goldberg Skylark 56 ARF or Skylark 70 ARF.

These designs were originally designed for pattern competition, and they're a bit more sleek and agile than your typical low wing trainer aircraft.

Good luck and good shopping!