what would be a great 1st aerobatic airplane?

Sig Somethin' Extra.

I chose the MID-Star .40 from Sig. It is a real performer with the GMS .47 I have on it. The idea of flying a low wing plane after my trainer was intimidating. The Mid-Star is a shoulder wing with plenty of capabilities and built as a trail dragger, a very good looking plane. I'll post a picture.
PS
I love your username

thanx ill look into them.

something extra!!!

If you're into building, I would suggest that the best 1st aerobatic model would be a SPAD Das PlaStick (http://www.spadtothebone.com). The reason is that it's so cheap and quick to build that it gives you great freedom from anxiety. You'll be more relaxed, and willing to take risks (keep safety in mind, though). Of course, you'll plant a few, like I did, thinking you're a better flier than you are, but I think you'll learn much faster.