External Network Hard-drive

[FamousDave]

Can anyone advise on a network hard drive that will satisfy my desires?

Plug into Wireless Router with Ethernet
Support Apple Time Machine (over network)
Pretty big to allow me to digitise all my stuff (probably 'bout 2TB)
Allow me to plug into an XBMC server (to be determined, also accepting advice) to stream the media.

I've got old school reservations against Western Digital or Iomega, but this may be similar to Skoda and unfounded these days.

The best I've found so far is this Seagate drive. Any good? Scared to commit if it doesn't deliver