So then that's not much different from just having a spare on hand then for single unit machines...hm. The thing is, I feel like I might be placing a lot of unnecessary value on having a redundant unit for home use. I just like the idea of being able to say "uh oh, PSU died, good thing I have a redundant unit in" and then going to order, or, throw in the 3rd spare I had lying around. Getting 2 of those 1U servers would be just like having a the C6100, except, as separate systems. So it doesn't make sense not to get the 6100 if I want redundancy. -_-