As far as engine break-in; you'll get lots of advice, so I'm going to leave that alone. The hole in your wing (I'm assuming it's only a hole in the covering, not the wood) can easily be fixed. Just get some clear packing tape, or scotch tape. My trainer has almost as much clear tape on it as it has covering by now. It's a trainer, it's going to get beat up, so just go with the flow.

I just recently purchased my second plane, a Sig Somethin' Extra kit (my first kit ever!). I bought that plane for both of the reasons you mentioned. I like the way that plane looks, and it's a good aerobatic plane that will let me increase my skills beyond what my aerobatic trainer can accomplish.

Good luck with your RC endeavors, and welcome to the addiction/hobby!