I am total unison with Stomper. I would build the Sig 4-Star 60 and put an O.S. .91 4-Stroke on the baby. Then I would clip one wing bay out of each side of the wing. This will make it a little less stable but on low rates it's like flying a trainer, and on high rates you'll be able to invert flat spin that baby all day long! You'll also be able to hang it on the prop a little. You may want to put a 120 4-stroke in it when you're used to the plane.

On landings, the plane just glides so beautiful. Full stall landings will be awesome. They're a sinch. Definitely spend your money on a 4-Star 60. You'll be happy that you did.
Clint