I'm moving from a 7 yr old G4 Sawtooth 1.4GHZ OS 10.4.8 with 3 internal 36/72GB Seagate SCSI drives hosted on an Atto UL3D ultra scsi PCI card (3 yrs old) to a new Mac Pro 2.8GHZ dual quad running 3 SATA II internal Seagate 7200.11 500GB/1TB drives. Can anyone offer an idea, "apples to apples", if I should expect slower, faster or about the same overall real world hard drive performance? I realize the MP will scream in comparison for memory related operation, video, etc. but I'm trying to understand the HD only "bottleneck" difference I'm likely to experience. No raid on the G4 or planned for the MP at this point so not looking for Raid comparsions - yet. I know generically ultra Scsi 320 is faster than SATA II but I'm guessing new technology, controllers, etc. should make my MP be at least as fast, hard drive-wise, as the old G4 w/Scsi. Any thoughts?