Hi Garth Man,
Yes! I missed an important point. It can switch btw region A & B (well at least in my country, Malaysia) so I could access all BDs imported from either US or UK. It can play BD ISO too if that is important to you.
I believe it can be connected to the NAS, more info here, my local country forum debating the Prime 3.0: http://forum.lowyat.net/topic/1402237
Cheers