Here's another speculative question for if/when I get a mac pro: I don't forsee myself needing the multiple terrabytes of storage most of you guys seem to have , since I'm still doing OK with just the stock 250GB that came with my G5 Quad + an external 120GB. I'll probably get a 750GB drive for boot, apps, and most files (leaning toward SpinPoint F1 750; the new 640GB WD also seems enticing). So, here's my Q: which would be a better setup for apps like Photoshop as well as the OS (I've read you can relocate the swap file?), performance-wise (both in terms of app speed, and keeping the OS from hanging on a busy disk) - using the slow stock 320GB as a more dedicated scratch disk (possibly just a partition on it, with other partitions for Windows), or using the free space on the faster, but non-dedicated, boot and storage disk? For that matter, would there be a better setup than a single large drive for OS, apps, and storage? I don't need to store the Library of Congress. I'd entertain RAID 0, as long as it doesn't tax the CPUs too much since my primary use for a computer's horsepower is 3D rendering. Cost does matter - even if it'd give the best file performance I don't need 4x1TB RAID. I'd like to spend less than $300 on drives.