Okay, I'm beginning to see what you're saying, and I am beginning to agree with you. I have a couple of comments and questions that I'd like to explore.
I've put my swap file on a separate partition for a while now. First thing I do when I configure an NT/2000/XP box is make the swap a fixed size, usually double the RAM size (i.e. 2GB swap for 1GB physical RAM). Then I point the swap to a separate partition whose sole purpose is to house the swap file (i.e. 2.5GB partition). My swap space never gets fragmented, and I like the performance of my machine this way. Never any problems.
Next, I've heard that reading from a RAID 1 array is much faster than reading from a single drive, so this is a plus for mirroring. However, it does take longer to write to two drives, so if you write a lot, that is a minus.
Now, regarding my situation....I have these two drives for this computer (SpinPoint 160GB x 2)....how would you use the two drives to get the best use out of them for this new machine I'm building? I'd like to be doing some backups, images, etc., but admit to not knowing the best way to configure them for best performance and preparedness for recovery.