RE: Best 50cc plane for IMAC
For sure the 2.3 Composite ARF is a sure deal with the DA-50 and pipe for what you are describing. This airplane snaps like no tomorrow and will perform the Basic sequence perfectally and sportsman sequence admirably.
It is a little low on power for 3D and advanced sequences, but for what you are describing I think you will raise the bar at your site with this combination. Good luck.
RickP