One of the things that is making my decision between getting a G5 Dual 2 or a Dual 2.3 is the addition of PCI-X slots on the 2.3 model. This model ends up costing about £400 more than the Dual 2, and i was wondering what the PCI-X slots actualy do? I have a Pro Sound card that uses a PCI slot with an external breakout box. Will the faster PCI-X slots make any difference to the performance of my sound card? Apart from that i can't think of any reason why i would need PCI-X. as far as i know, its for new graphics cards, but i have a pretty decent AGP 8x graphics card, and have no intention of buying a new graphics card. Does anyone know of any new technology on its way that will use PCI-X properly in the next few years, or is it worth just saving money and getting a dual 2 with normal PCI slots? Any help or ideas would be great. Thanx!