Ok.. i understand now.. I saw that the processor trays are like 400 bucks, but you are also right that the processors are really expensive.. yeah, I will just stick with the w3580. Now, is the main logic board the same throughout the board with the 4,1 macs pros? I mean the backpane logic board, not the processor tray.
But its good to know that if I can get my hands on a dual processor tray and down the road dual processors, I can still grow with the nehalem mac pro.. Again, this is probably going to be my LAST MAC as it is getting expensive for me.