RE: SIG Something Extra, GP Skybolt or GP Ultimate
Why not look at the Sig Ultimate Fun Fly?
I have an SE and while it is a very good sport plane, it has not lived up, in my opinion, to the hype that surrounds it. Granted the CG is still a little forward on mine and moving it back will more than likely help smooth things out while making it slightly more responsive, but I've never seen a slight CG change make that much difference. I will also admit that I flew nothing but pattern planes for several years so I am spoiled. But, I just don't think it's as great as a lot of people have stated.
YMMV,
John