If you truly want light the KOA feather light is a nice knife in D2. Sharp son of a gun that weighs nothing.

http://www.knivesofalaska.com/item.asp?id=38&r=store%2Easp%3Fc%3D44

Looking hard at one of these mini or full size in s30v:

http://www.dougritter.com/pp/pic2062.htm

http://www.knifeworks.com/dougritterknives-gear.aspx