Hi Steve,
I have a Tomahawk, (Tommyhawk) and it is one of my more fun fliers. It is powered with a Magnum 25 with a 9.5 prop. I had a Fox 35 on it, but it had way too much viberation, and kept going lean. Mind you, that this was after a couple of horrindous crashes that weakened the fuse. I would stay with the smaller engines and have a good time with less probs.
Lee TGD