I think I know most of what I need to know, but a couple more things would help... (1) Can you backup two different Macs to the same Time Capsule? I think you can but want to make sure. Would all this be automated through the relevant Time Machine app on each of the Macs? (2) How noisey is the Time Capsule (based on people who have used the newest version). I was thinking originally of Airport Extreme but thought I'd get the backup facility as extra. I know it's not going to be very noisy but considering my Mac is an SSD it seems that putting this close to it loses the noise-less SSD benefit. (3) Does it slow down your Mac at all (whilst backing up)? (4) I use an online backup (BackBlaze) for my PC and was thinking of using that for my Mac. I'm quite happy with it. What experiences have people had with TC and any of the online backups (so I can get an idea which to use).