Well, I don't see myself putting anything more than /boot on the small RAID1 set, and I don't see any reason to make that very big at all. I mean, it's pretty much just the kernel, and how often does that get bigger than a few megabytes? As such, swap would be ((a few megabytes)/2*6) worth of space, and that seems kind of irrelevant.

I was strongly considering running without swap anyway. I've got 6GB of RAM in the system.