I personally know 2 guys who have the Fisher seats on their Bergs, and one guy who has the seat on his '11 GG EC300, and they are all happy customers. Price is about the same as the Seat Concepts if you send the seat out for the labor. The SC uses an all new cover, whereas the Fisher adds material to the stock cover.
'11 KTM 250 XC (dual sported)
'05 KTM 450 EXC (dual sported)