You will not have USB2 you will have USB1 which is very much slower.
You can buy add on USB2 cards to fit in a spare PCI slot. I know Dabs do a 3USB2 / 2 Firewire card for £25.
This would give you the option of the Firewire iPod. I know the Ipod is hard to get hold of at the moment and the option of being able to use either version may be useful.