how much do you want to spend? The 60 sized stik and twist are probably the most affordable. I like Stiks because the motor is way out in front and I don't have to fuss around with a cowling, etc to get at the engine. I have a very limited time to fly. So when I'm at the field, I want the most simple, reliable and durable model I can find that will get me into the air as quickly as possible. For me, that means a Stik and an OS Engine. Plus, repairs are cheap and easy. That said, I'd love to try a revolver and twist.