Poorkid, you're at the right stage for a 3D plane. Just keep it nose heavy and keep the throws toned down on the first couple flights and you'll be fine. I went from a Train-Air, (very similar to your avistar) to a Somethin' Extra. The avistar is a decent airplane for beginning aerobatics and thick wing stuff can be pretty tame when flown conservatively.

I haven't owned a Pizzaz but I've flown one. It's a decent design. Hovers/TR's very stable. Harrier had some wing rock. KE not as good as a profile. Forget a KE loop.

If you don't mind "building" something, look into a Tufflight 4D: http://tufflight.com/4d.html I own one. It's incredibly durable, will do anything 3D related, and is pretty cheap. It's easy to build as long as you don't try to make it look good. And it breaks into a stall quickly and smoothly like a scale airplane because of the thinnish wing. It's as far from scale as you could get, but it's very practical. It also won't do precision very well.