Hehe, welcome to the dark side of glow power...

You may want to check out the H9 Funtana S or the Great Planes U-Can-Do .46, both are good 3d airplanes. The UCD is more for someone getting started in 3D, and the Funtana is a little more advanced. A pilot with intermediate experience would have no problem flying either. I've flown both(I own the UCD) and like em both. They are, however, a little over the 100 buck range. I got my UCD for 135.00 from the LHS, and the Funtana S is around 140-160 most places. The Twist is a good choice as well, being lighter, I think it would be well-powered with a smaller .72 4-stroke. Mabye a Twist expert will jump in here and correct me if I'm wrong.

If it's power you're after, I'd go with a Saito .91 4-stroke on either of the first two. Excellent power.

EDIT - I'm sorry, I didn't see that you want to go with a 2-stroke. IMO 4-strokers are the way to go for a 3D airplane, they'll swing a bigger wider prop. But if you're set on a 2-stroke, I'd think a good .50 would be enough for the Twist, depending on your altitude. With a .60 in the Funtana or UCD.