jigeye,
Like Tony said, there is more to consider than simple categorization.
The FIRST thing you need to decide is, what size model do you want? Know that, like full scale, the bigger they are the easier they are to fly; with exceptions, of course.
The Chipmunk is indeed a good aerobatic "trainer", in some examples. The Goldberg 60 size is a real jewel with a modified wing that won't snap at the drop of a hat. It is relatively easy to build too, as wood kits go. Dunno about the larger Great Planes version, but I don't recall reading any major negative complaints about it. One problem with this style (wing-mounted mains) of plane is a tendency to nose-over while taxiing. The Goldberg does this; again, dunno about the larger GP.
I'll agree that an Extra or Edge is a better choice. It is amazing how stable they are when set up with docile throws and slightly-forward center of gravity. And no ground-handling problems.
You've definitely come to the right place for advice. SOMEBODY here will have had experience with anything you choose.
So keep reading and asking questions. It can be a difficult decision, due to the broad selection available today. Heck, I've been in the hobby for almost 20 years, and agonized for MONTHS over which model to buy when I decided to get into bigger planes.
And, IMAC is a great place to begin. I became interested in improving my skills, as opposed to just boring holes in the sky, and have been dabbling in IMAC. I really have no interest in competition, for competition's sake, but learning how to PROPERLY trim a model, fly manuevers according to a set procedure, and having to pay attention to many aerodynamic considerations I once took for granted, have all contributed to making me a better pilot.
I hear you re "3D"; I have absolutely no interest in that sort of thing either. IMAC is cool, and very challenging. Get on the IMAC site and download all the articles, etc. that are available; then study them. There is an incredible wealth of knowledge in those few documents alone.
Welcome aboard...