I would definitely recommend the Tower Trainer. Even if you buy the ARF, and then ask around at the field is someone has a used 46 sized engine they aren't using, you could be up and flying on a very cheap budget. I still have my tower trainer and its been a blast to fly, and it will even handle most of your basic aerobatics, and flies inverted really nicely when balanced properly. I've upgraded my trainer to a Magnum 52 4 stroke engine, and its nice, quiet, goes slow when I want it, yet pulls enough to do whatever aerobatics I wanna do.......

Have fun and welcome to this hobby... it will get addicting really fast.......