Just a simple choice between the two? Blackwidow Ultimate due to the its mechanical keys. However, you haven't told us what you are going to use it for specifically. If you are mostly into that MMORPG crap, you are better off with something like the Logitech G Series KBs that offers more physical keys on the layout of the board to help bind various spells/macros. Just remember, better KB =/= better individual in-game performance.