ata=Pariall ata(cant spell it so.........)
Sata will run right now at a max of 150mb/s and is mainly used with a 8mb buffer/7200 rpm. The highest ide drive runs at 133mb/s 7200rpm and 2mb-8mb buffer. Ultimitely when comparing the two sata has no dissadvantage, although it has no jumpers u can count that against it o for it but i hate jumpers.
And almost all mobos have sata ports, so go sata.
Ps--If you want a fast machine get 2 74gb raptors or 2 36gb raptors plug em into raid 0 and danm one fast computer. They run at 10,000 rpm each cost half as much as a 10,000rpm scsi drive and are comaprable in speed.