cubx is $96 & cusl2 is $135 on pricewatch I have a 633 celeron to put in it now but I`m wondering down the road if a P4 won`t work in either one why spend the extra money on the 815 chipset board? All I`ve heard about the P4 is now it will work with rambus and sdram, but will it work with the 815 chipset? Any upgrade advise for a P2b user?