Are the planes worth it?
It's all relative. I bought my first full scale plane, a full IFR cessna 152 for 13,000. Flying that from inside was a heck of a lot more fun than models.
Personally, I believe that flying models has gotten to be more expensive than flying full scale. At least if your flying 35 and 40% models and turbine jets. The "hobby" has gotten way out of hand. I think we now in the midst of "Yuppie R/C". Everyone has to one up the other guy. Even if they can't fly for squat.
It's not what/how you fly anymore, it's how much you spent, and mines bigger.
Silversurfer