Starting out- engine quality
Great to have you coming aboard Edwin! You will like giant scale and love gas engines. They are really nice!
I've only flown giant scale aerobatic planes, but I would be a little cautious about the warbirds. I've heard some can be quite a handful (just hear-say however).
Start with a brand name engine, such as 3W, Brison or BME (there are other good ones out there). I started with a ZDZ (it was a new engine to the U.S. at the time) and I wouldn't suggest starting with a new brand of engine. Start with a tried and true performer.
I have a 3W100 and it is a high quality engine that runs great!
Here in the Dallas area, there are a bunch of Brisons. They are made locally and if you have problems, I've heard they are very helpful.