I've been considering these for when my d800 would come in, but the charts you posted dave gives me second thoughts.
I got 2 X 95mbs SDHC cards which got some pretty good scores even on the d800. I cant justify ordering new cards for the difference in performance in writing between the two.
I'm pretty sure I could get a decent price for my cards in the used market tho. It would almost be worth it to change if so.
Not sure what to do.