Okay, I'll throw in my 2cents worth. Forget the twist, it is close coupled and not as good as your something extra. I had one, and really didn't like the negative tendanies a close coupled plane has. Almost think H9 tried to steal the Sig design, but screwed it up. The UCD is definitely a great choice if you want neutral, 3D capable. You already had that with you Sig Something extra. If you are really up for it, you can try a Goldberg Matix. It has a swept wing, large surfaces and can cross over into both pattern moves and 3D. It is not as forgiving as the UCD, but it flies a line so staight and pure (pattern design) that it makes old guys like me even look good. I own a UCD .46, Matrix, World Models Fun World 3D120, Funtana .90, two extra's (1/4 & 33%) and really like the matrix the best on calm days with little flying time available. On low rates, anyone can fly it. It knife edges with almost zero mix required, out snaps my Giles and Ultimate, and does every pattern move I ask it to. It will also hover, harrier, waterfall and flatspin as good as any of my other bigger planes. I highly recommend an OS .50 SX on a tower muffler and an APC 12X4 prop for unbelievable vertical. There are a couple treads on this plane. I do recommend good servos, but standard servos on six volts will make it work. I am using digitals on mine and it flies like it is on rails. The funtana .46 comes close to this, but can't do the pattern stuff nearly as well.

Like I said, just my 2 cents worth. Want more, it will cost you another cent. Have fun.