any decent .40-.46 should pull it just fine for trainer style flying. I recomend the OS .46AX if you can budget your way to it. It's a good match for that airframe, and will carry you over to your second (and third maybe) plane without having to buy a different motor. If you get your hands on a lightly used OS .46FX or NIB/NOS .46FX that'd be a good bet as well.