I have to agree that 3D plane is too big of a step.
I am currently flying a Hangar9 Showtime (which is almost the same plane as the U-can do) and even on low rates it has an insane roll rate and even after about 25 or so flights the pucker factor is still there. I would not have been able to handle this plane as a second plane, no way.
If you want a good aerobatic plane that is more within reach try a Pulse or even Twist.