If your looking at Tower Hobbies I would stay away from the Combo, If your planning to stay in the hobby and it sounds like you are I would get a better radio with at least 6 channels and I know I may get flamed for this but stay away from the Tower engine for the first engine, They have had some quality issues with air leaks and are a little harder to tune, If you have the funds to spare I would suggest the OS 46FX http://www2.towerhobbies.com/cgi-bin...1&I=LXBY45&P=0 but if your a little tighter on funds like most of us I would look at the Thunder Tiger Pro 46 http://www2.towerhobbies.com/cgi-bin...1&I=LXKF97&P=0 both of these engines will last you a long time and be powerful enough to put in a low wing sport plane when your ready to fly one. If your going to get a 60 size I can't make any realistic suggestions, My space is limiting and can't fit much bigger than a 40 size in my car. But just get a good engine that is easier to tune because being new gives you enough o deal with without needing to tune it. The OS engines I have seen and do own all come out of the box factory tuned and need no tuning to get into the air and from the research I have done on the Thunder Tiger they may need a little tuning out of the box but are easy to get tuned and run great, I f you get a less powerful engine like the OS LA series it will run great but won't have much extra power for the next plane and may find yourself buying another engine for the next plane when you eventually retire the trainer.

Good luck
Dauntae