thats what i was thinking too that the cfm/voltage relationship wasnt linear...
the reason i was thinking of just a 4 switch one in my 1030b (its coming yay!) was that i was thinking of 2 92mm fans at the bottom (will they fit? maybe i can sand down the edges of the fans or something if they dont), the 80mm fan on top of that for the drive bay, the 2 80mm fans on the back, and one at the top... the 2 92mm fans on the bottom front would be controled by one switch, since they're next to each other yunno (same iwth teh 2 back fans)...
anyway, yea thats my plan, and if everything goes through (i dont run out of money) thats what i'll be doing... that would be my dream pc ahhhh =]