Hi Steve,
The ST bluehead or OS fsr would both be great (preferably with a tuned pipe. The upright Hanno will have the longchamber pipe sticking pretty far back, plus it would be overkill (if there is such a thing in a pattern plane). The Hanno wants a big enough prop to keep the rpms under 11,000 unloaded in the air (so a 12x10 is probably the minimum). How much prop clearance do you have?
captb - great looking Phoenix 7. The OS .61VF is one of my favorite engines; very user-friendly and plenty of power. If you want a rocket then get a YS 60FR ( a bit hard to find these days) or a Jett 90 (beautiful piece of machinery, but a bit moe expensive than the average .60).
Happy flying,
Will