The Thunder Tiger Pro series is an unbelievable value...I have 5 of them, 4 Pro .46's and 1 Pro .40. They take a little longer to break in, and proper break-in is important, but once they're broken in, they run beautifully. Mine just seem to get stronger and stronger, and start right up every time. They're probably not quite as beginner-friendly as an OS FX engine, but maybe when you have some experience under your belt, it might be worth a try to get one. I have a flying buddy that swears by them also. They also have a 3 year warranty. The Pro .46 can be found for $75 at Tower Hobbies.