I went from a trainer to the Dolphin to the Great Planes Venus II:
http://www3.towerhobbies.com/cgi-bin...?&I=LXLHV1&P=7

Want aerobatics? It doesn't get much better without spending hundreds more dollars. Will it fit in your car? I drive a Civic 2 door coupe and it fits in mine! The performance of this plane (with a 120AX) will blow your mind! Flies very easy and very capable of winning AMA competitions. You will LOVE flying a plane of this size and stability!

And, only $280 minus Tower discounts. You can't beat it!

If you want something 40 size, the Venus 40, under $200. I fly mine with a 46AX and it's very nice. A 55AX or 70 four stroke would be amazing:
http://www3.towerhobbies.com/cgi-bin...?&I=LXBMZ5&P=7