I would suggest you go with the LT40. The engine you spoke of is fine. I've heard some people wish they'd gone with a 9C radio rather than the 6E, initially, despite the difference in $.

Exception : If you're going to teach yourself (not that I'd recommend that, but if you are...) then get a simulator, or the Nexstar (which includes one.) You'll find the sim allows you to practice and learn maneuvers without risk, and that the things you learn on the sim do transfer to the flying field.

Good luck!
Dave Olson