Ok guys so I was looking to get a second HD in my Mac Pro 1,1 2x 2.66GHz 8GB 667Mhz Ram. I am looking into getting a SSD or HDD. I want to dual boot Windows 7 Ultimate and Mac OS 10.6.7. I came across some interesting drives. I am currently running a Seagate Barracuda 7200.12 Sata 3Gb/s 32MB Cache 7200RPM Link 1st HD: $190 Vertex 2 3.5" SSD Everyone knows SSD's are way faster than HDD but the cost is very High. I already have a OWC 115GB SSD in my MBP and I love it. 2nd HD: $167 Barracuda XT Sata 6Gb/s 64MB Cache 7,200RPM 3rd HD: $60-90 Barracuda Just like the drive I currently own. Ok so now my questions are. I dont need the very fast speed as a SSD in my Desktop. So is a SSD really worth the extra money? Does the 64MB cache and 32MB cache make a difference? And will it work in my Mac Pro 1,1? Which drive is better for the price above? Do they all work in the Mac Pro 1,1? Thank you guys for your help.