The Exceleron 50 would be a good airframe and they are still available for $150.00

[link]http://www.hobbypeople.net/gallery/127564.asp[/link]

A super Tiger 90 should hall that baby aorund. I run a 70 4Stroke in mine and it's under powerd.

I run standard hitech Hs-545BB servo's in it on 6.0 volts and it fly's pretty damn tight.
check out Servo City [link]http://www.servocity.com/html/hs-545bb_high_torque.html[/link]

Or maybe HS 965

My 2 cents worth