The use of the Khopesh as a weapon was more akin to a chopping action rather than fanciful swordplay. I use 1d6 20/x3, 5lb, slashing (same as a Handaxe) with a Noble's Khopesh being 2d4 20/x3, 7lb, slashing (as a Battleaxe with a slightly higher average). No special features for either.