Boomerang Sprint is easy to fly, will take a large range of engines and fly well with all of them, and will do all the aerobatics you can do with most piston planes. Best of all they are cheap and well built. Easy to set up. Although, ... Don't put a 140 in it and fly it full tilt. Bad (catastrophic) things happen. Don't ask.
Also, the Excalibur is another nice flying and looking trainer. We have one here in the club. I was impressed at how fast it flies for only an 80 for a turbine. It too is fairly aerobatic. The pilot likes to fly it! Nice entry level plane.
Some of my guys did not like the Turbinator, especially the ones with a one-piece wing. But if you get the right power level, our club has one guy that still flies his regularly and seems to like it. Oh,... his first one did come apart mid-air though & it took about 5 minutes for all the debris to finally come to the ground. But, ... he must have known something we didn't, because he bought another one.