Personally, I can't wait till the 74 GB raptor(SATA - 10000 RPM) gets here that I ordered today, course, its quite expensive at $258 but it is the fastest drive on the market today.
Ive got 2 120Gb seagate 7200.7's and one WD 80gig specail edition. The performance difference between the drives is negligable, but i prefer the seagate drives because they are quieter.