I have a readynas ultra 2 plus and a readynas ultra 4 plus. Really like both but only the ultra 2 has USB 3.0. Are you sure gigabit won't be fast enough?
+1
I have an older ReadyNAS NV+ or NV that works great.
I use it for all of my media streaming.
What I like is:
-AFP support
-WINS -- Can act as a WINS server for my home network
-4 x 2TB drives -- 6TB usable
-8-10MB/s could be faster, but I haven't messed around with it in a while. You can't expect much from 4 x SATA drives.
-Jumbo Frame
-Spin-Down, all my drives sleep during the day and only spin up maybe once a day if I watch a video or store somthing.
-FireFly streaming to TiVo -- this works okay, not great. I've had issues...but if you get it working right it's pretty cool for streaming movies to your TiVo. But now that I have an AppleTV2, i don't use TiVo anymore for that.
-UPS integrated shutdown.
There are a bunch more features that are pretty cool. It's not super cheap, but It works reliably.