Right-on Spyinthesky -- a trainer NEVER gets boring -- pilots just do boring things with them. skate 5290 -- if you are smart you will keep the trainer forever & use it to train -- that's what it is for. Don't be offended, but I doubt very much if you can fly it to its full potential -- it takes a very skilled pilot to do so. Whatever your choice of second plane, you will be a much better pilot if you keep trying increasingly difficult stuff with the trainer. Add a dose of power to it and keep going.

If you just have to go ahead right away, a nice progression from your trainer would be a GP Easy Sport 40 -- another plane that you should fly the butt off before "graduating" to something serious.