I'm looking at putting together a crossfire system. I would like one of the cards to be the ATI X1800XL All in Wonder as I will be using Media Centre '05. I have read that certain cards in the ATI X1000 family will run together in Crossfire mode without a mastercard. Does anybody know if I could put two ATIX1800XL AIW cards and therefore double the amount of tuners I could use in Media Centre as well as utilising the graphical abilities of the cards using crossfire?