Steve,

I would suggest going with a high or mid wing plane that can be more trainer like at the onset and then can also handle aerobatics as you progress. A forgiving low winger could do the same for you. For high wings, something like the Decathlon can handle like a trainer in the air, but do any trick later. I toss around my Toledo Special like my low wingers, but I think a student could learn on it well at lower speeds. That is too small for a DLE-30 if you really want that engine though. Your idea for the Extra 300 could work ,but I think would be too challenging for a 1st or 2nd plane. I think there is a large Pulse that could work for you...it's a pretty low winger. A large Stick would also be a good plane. Good luck on your endeavors! Jon