RE: Need advice for a RC beginner...
Looks like some nice planes there. Those powered gliders will make great trainers since they are slow and docile - they give you time to think. That Kadet Sr. really looks good with the transparent covering.
Is that AMA number on the Cherokee your grandfathers? If so, looks like he was in the hobby for quite a while based on it being a 5 digit and starting with a 35.
Hogflyer