It looks like there are only three manufacturers of an 8m wing - North Nova Light Wind wing, Gong Superpower and F-One Strike CWC. I would definitely like to see reviews for these big wings before purchasing.
Gong Superpower 9m is going to be too massive even for me at this point. I can't imagine handling one of them(12'-4" wing span, and Gong's Pulse is 13'). Would probably need a long mast.