I won't get in to the middle of the FreeNAS vs UnRAID debate as I have never ran UnRAID. I do run several FreeNAS, several Synology NAS and WHS here at home and work. Everything I've read about UnRAID sounds good just never felt the need to change.
I do take issue with the beta comment on FreeNAS as I have been running one at work with 15 users for over three years and it has been rebooted maybe a half dozen times. Having said that if you tried the latest 0.8 branch yea it is beta-ish. The last of the 0.7 releases 's specifically 0.7.2.8191 and most of it's predecessors have been rock solid for years. The funny thing is one of the reasons I never tried UnRAID is it sounded kind of beta-ish
I guess it is all in the eye of the beholder.
My take on the various options I'm familiar with.Synology
maybe the nicest software but pricey since you are locked into their hardware. If you don't already have the hardware this is the easiest way to go.FreeNAS
very nice if you stick to the 0.7 releases, dated but gets the job done. Very mature unless you move up to the 0.8 release for ZFS (see below) or something.WHS
great for backing up PCs and not a bad server. At it's current price pretty cheap for MS.UnRAID
the big attraction here for me is having all the drives available standalone if needed. Downside is performance but still plenty fast for home use and not free.Vortexbox
Just became aware of this, since I'm a Linux weenie from way back I'll likely check it out.Open Indiana/Solaris
Enterprise quality with ZFS and it is free. Probably the fastest and most error tolerant server due to it being based in the Enterprise world. ZFS is pretty awesome when it comes to file systems. FreeNAS (FreeBSD) have it but the quality is still not quite there yet. If the OI project stagnates due to Oracle I'm confident FreeBSD will eventually get there. Definitely overkill for home use but it is where I'm headed using VMs on top of it.