I went to a diamond max10 200GB drive, on SATA with 7200 / 8 meg cache from a 60 gig gxp 120 ibm wiht 7200 / 2 meg on ata 100, and tbqh, havent noticed any diff really, except for more space and a tiny bit quicker, which in any case, will be down to the 8meg cache rather than anything else...