I'm new to glow planes as well. But not new to flying (flying electric for 3 years). My trainer is a Hangar 9 Arrow. OS .46 AX engine.
Paid $105 I think for the engine. Man at the LHS who's been flying for 30 years says you can't beat the OS and TT .46 engines. He says the OS is just a tad smoother but you can't go wrong with either one. The Arrow has a semi symetrical wing that you can do some aerobatics with but is still a trainer at heart. I haven't had mine in the air yet but 4 tanks of fuel has been run through just taxi'ing around and the first 2 fills was to run in engine. Starts up without even using the torque starter. Just flip the prop over by hand and it fires up.

Dave...