RE: prop diameter vs pitch
Pipe, you made the right choice. Many trainers are much too fast using the "standard" 6" pitch prop most often recommended. I've taught beginners on planes they couldn't fly at over half throttle. Going up an inch on diameter and down a couple of inches on pitch makes a much nicer, slower-flying trainer bird. You're also correct when you say it's that low pitch and more thrust that will pull the plane out of trouble, especially at low speed.
Dr.1