I just got into flying larger airplanes and have to say that the larger size seems to make them more stable, which is a good thing if you are going to practice 3D manuvers. I'm in the process of finishing my UCD3D and it looks like it will be a blast to fly. Quality of the ARF is good with less assembly than any other ARF I have seen.

Fuel consumption will be higher but if you learn your tricks faster due to the increased stability there has to be some offset there...

I still have some .40-sized planes in the works and own many engines of that size with no intent to abandon the small stuff.

Hope this helps.

Tom