I'm using a tvix 6500 since some three months. Total acquisition price inl 1.5TB HD: EUR 399, which is not to bad at all imo.
Installation of the HD took less than 2 minutes, very simple just connect a cable and push it into the disktray.
My wife converted all DVD's (and that says something, as she already has to call me on how to restart the pc ;-).
She used AnyDVD, which automatically removes any copy-right protection and annoying pre-movies, to rip the dvd's in one click. After ripping all CDs just start up My Moviies and it found almost all of the album info and album covers automatically. Very simple.
After that, just connected the tvix thru HDMI to the BV7 and there it goes!
The userinterface is very simple as far as I consider (in Icon mode), Even my little son of a little over three years old uses it intuitively. The tvix itselves looks ok (sure its not B&O) but it is small and can easily be hidden away. I wish B&O would offer a solution like this, but for me its one of the best things I bought (of which my wife did not see the need of) in years.
Very convenient, good UI and affordable.
and on top of it: it comes with a ftp server build in, so I can access it from everywhere in the world on my pc to see the movies.