Just to update the thread with propeller choices---I'm pretty much settled on the APC 9X6SF (Slow Flyer) propeller. Flew the little Ultimate a few times this past weekend, and although you definitely aren't going to 3D this little plane with the Park 450 and 9X6SF, for all around general flying and aerobatics I think this one is going to be the best trade off in power vs. flight time.
Besides, you don't have to cut out the openings in the dandy little red spinner that you get with the ARF
