I am currently looking into getting a NAS, I was looking for them a couple years back and because of budget and needs at the time I just decided to go with a WD Live. I now want to upgrade to more of a home system. The main things I want are the Ability to back up from multiple Mac's also windows is possible but not a necessity. The other main thing is for it to be able to run as a home media server - Plex or XBMC. I like the idea of Hot-swappable HDD Trays. I also want to start running a RAID setup as my data is just building and just cant risk a failed drive! Personal Cloud - A good app that actually works well would be a start as I find the WD app slow laggy and just unreliable. I have been looking at QNAP and Synology but really don't know where to go!