I own a Cessna 182 and the stock motor has plenty of power, especially if you use a lipo battery (flights last longer and overall weight drops noticeably).

Don't know where you are getting yours from, but I've heard some of the sources on E-bay use a 370 motor, instead of the 480 motor. Parkflyers.com offers the one with the more powerful motor. There is plenty of power, so I don't think you will be disappointed with the stock motor.

Jmir