[H] Which NAS Devices?

[Anthony Q. Martin]

Strictly for home use.  Backup of multiple computers, streaming audio.  
Probably will start with 2TB.  Don't think I need more than 4 to 6 down 
the road, but likely not even that much.  I don't have kids so streaming 
video from an HD just doens't seem important to me. Besides, I have so 
many Blu-rays now that I could never back them up.

Anyway, is there something good for under $200? I know the DLink DNS-323 
is going for $150 on Amazon at the moment, but there a better choice?  
I'd like something with esata and USB3.0 too, if possible.