The Goldberg Falcon (they are back at Tower) is a great intermiate trainer. You can start to learn acrobatics with it. I flew one for years with OS 40. Must have put 5 gallons of fuel threw it. Great for fun flys. My buddy ran it out of fuel and landed on a free way and it got run over. The engine survived and I still fly it today.
I am going to build another Falcon.