I flew mine with a Magnum 46 2S, with good vertical performance and the ability to do just about any aerobatics, short of 3D, that you might want. I put a Magnum 72 4S on it just to see the difference, and felt it was underpowered (although it did land slower, probably due to the larger prop). A friend at the field also has one with an OS46, and he's happy.

My personal opinion is that you'd be better served with a 2S.