How about a 50cc gas motor? This bird can handle a BME 50.
I had the Extra 330 and powered it with a BME 44 and it was a little underpowered for my taste. If you go gas the 2.10 will be perfect except for the two dollars per flight thing not to mention the slime from glow. I have had two OS 160s on 13 pound planes and they just did not have enough power to hang on the prop and pull out. If 3d is not your thing then the OS would be a great motor for that plane. 1200sq in of wing area will handle a 3 pound motor with acc with no problems..