The Avistar is a good trainer, a lot of people at my club own them and they fly well (I still occasionally fly mine), but I think from specifications alone, the Super Sports 40 would actually make a better trainer... The Avistar has a smallish wing (around 600 sq in) and has slightly higher wing loading than most trainers (at around 19 oz/sq in with a brushing 40-46 or 20-21 oz/sq in with a BB 46), while the Super Sports 40 has a bigger wing (almost 900 sq in) and very light wing loading (although unadvertised, it's gotta be around 15-17 oz /sq in given a 5.5lb weight).