I've heard Spicedcrab say that he really liked the way the GWS Formosa II flies. I believe it's a foamy ARF. Also, from personal experience, I really like the plywood/balsa Great Planes Mini Super Sportster ARF w/ speed 400 motor. It's a low wing w/ dyhideral plane that can fly slow enough if you want to or lets you perform all sorts of high speed thrilling sport aerobatics if you wish. Just be warned that I've destroyed 2 Sportsters (as of 2 days ago) because the wings folded/seperated in high Gs due to my error in glueing/repair work.

Both these planes require you to provide all the radio/ESC/servo equpment etc. The MSS comes with a speed 400 motor, but I don't know about the Formosa II. I upgraded both my MSS to E-Flite Park 450 and 480 brushless motors and even on 8-cell Nimh they flew great.

You can check out the thread in the Sport and Aerobatic Planes forum for topics on both the planes.

I'm sure there are other cheaper RTF options too that you all can chime in with.