Spending too much time on these forums while I'm waiting for my new iMac. I decided I could safely return to the beautiful all in one form factor of the new iMac after using a Mac Pro for the past two years for a number of reasons. I love aesthetics and the glossy screen, and with the increased FSB, speedier RAM, and the 3.06GHz processor I thought I could make the change without any noticeable performance decrease. The option for huge hard drives also appealed to me. I was under the impression that hard drive performance is greatly influenced by how much of the hard drive is full, and that 50% is a good rule of thumb. Since all of the hard drives offered in the iMacs use the same type of connection and are all 7200rpm, I opted for the 1T. My thought was that my current 300GB of data would have plenty of room to grow before I hit the 50% (500GB) mark. I've recently read two comments that gave me cause for concern: the first was that the 1T hard drive is slower than the 500GB or 750GB iMac hard drives. The second comment made it clear that it is highly recommended to have separate hard drives when editing video: one scratch drive and a second one for data. I don't do a ton of video editing, but I do have an AVCHD camera that I use with iMovie 08 from time to time. Given the CPU and speedy new RAM & FSB in the new iMac I'm confident of great performance in all the everyday tasks that occupy +90% of my computing time and that do not use the multiple processor cores of the Mac Pro anyway. I am wondering if ordering the 1T drive may have been a mistake though, especially when it comes to working with video, and if it really is slower. Does anybody have first hand knowledge of the 1T hard drive in the new iMacs? Thanks!