because of several problems i ran into, running the MK3 on windows xp (using ableton), with usb 2.0, i decided to buy new hardware ( i need to buy new hardware anyways). my main musicprogramm is Ableton Live and i am going to buy Cubase 5 (<<<<<buuuhuuu... i know

1. a lot of ppl on the motunation.com - forum are saying, that the MK3 is not working really with usb 2.0. a better solution here should be Firewire. my first question is.. which Firewire-Card should i buy and wich Chipset.
2. any suggestion on motherboards/cpu (quadcore) and ram?
3. which graficcard should i use. right now i have a real good nvidia card. but from what i heard, sometimes its better to use the onboard grafic cards. dont know why really. is this right?
4. is win xp still the best os on windows for audio. i heard that vista and windows 7 are still causing problems.
if somebody has good hardware configuration that works fine with the MK3, please post it here... that would help me a lot, thanks