I have the Skyshark Edge 540 and flew it today

. I run the Saito 100 on the business end but since the Saito 125 came out that seems to be the engine of choice now. GSP has a nice 90/120 size Chipmunk that the Saito 125 would work great in. They also have a 90/120 size Extra 300. Check this site out.
http://www.glowrc.com/default.html
They have the cheapest planes I have seen on the Net and they are the same ones others are selling for a much higher price.