wreckerbc1,
I started this addicting hobby only 2 1/2 years ago. While learning I bought an LT-40 from a guy at our club. He had owned it for 2 years and it's what he learned on. This Kadet has been used by other club members to train folks interested in getting into flying. It's such a gentle flyer it makes learning easier. My LT -40 has a .46 Tower motor on it and it has been flawless now for over 4 years and countless flights and is still running strong. The beauty of this motor is you never have to tinker with it, just fuel it up and fly it. If you look on the spec page on Towers sight, it is listed at having 1.75 BHP at 16,000 RPM which is a little more than the SK and the OS.The best part is it's just under $80.00 and if your not in a hurry for it they put them on sale every now and then. Since having such good luck with this Tower .46, I have bought 2 others and put them in 40 size planes with the same great results. I now have 3 that run perfectly and produce tons of power for a 46 size motor. For me, you can't beat the performance or the price of these motors.
Good luck with your choice,
Peter