I Need A New TV On DVD Obsession

So, we need a new DVD obsession.  Let's face it, there is bloody little on US television now worth watching.  So J and I are working our way through worthy dvd collections.  Unfortunately, we're coming to the end of our list and aren't sure what to pick up next.   A lot of the stuff is not from the US  b/c amazon.uk + all-region player =  my best friend.  I just want good, quality comedy or sci-fi or both.  Actually, anything really.  Read below for our tastes.  I need suggestions!  HELP!

What we've seen and LOVED so far:  The IT Crowd, Father Ted, Vicar of Dibley, I'm Alan Partridge, Knowing Me, Knowing You, Firefly, Dark Angel, Little Britian, Brass Eye, Red Dwarf (yes, all of them), Wonderfalls, Strangers with Candy, The Mighty Boosh, League of Gentlemen, The Office (UK), Doctor Who (2006-present) and we're just finishing up MilleniuM.  There are others I am forgetting...

ARGH!!!  Where to next?