No need to go extreme like with the .225mm pin matrix from the XT....what about a MCW-70 with the .6mm x .6mm pin matrix from your Komodo blocks? Have a nice low pressure drop, give it an awesome and flexible mounting system. Nickel plate the base (if for no other reason than oxidized copper looks old/bad and a lot of people buy these blocks to reuse them). Make it compatible with recessed o-ring barbs as well. (don't I make it sound easy?)

MCW60 nomenclature is getting a little long in the tooth, even if the block still provides great temps and all the cooling performance GPUs will need

GPU blocks have all the performance they need, IMO. I have yet to see a quantifiable gain from dropping a few degrees from an already cool GPU