I have one of these on order. Sounds like the best thing going in the 5.5 to 6 pound range. I was looking for a home for a SA100 and was strongly considering the PA540. The Fliton sounds to be a bit stronger on its side so I went that way.
http://www.fliton.com/new/doc/frame.asp
EXTRA 330 Freestyle (Nitro Power)
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Wingspan : 1,520 mm (59.84 Inches)
Length : 1,455 mm (57.28 Inches)
Bare Weight : 1,300g (approx: 44oz)