Good engine, lots of mid and high range power. It's tricky to tune (not for beginners) but once you get the hang of it you will be able to tune any engine. When I had mine it liked to run hot, around 280 for max power.
Wasp will be much better than a Mach .26 I would think. Its a great engine with buttloads of torque, costs a tad more than the SH cause its got some highend too. I liked it but it was a tad tricky to tune, but not bad.