I could be really tempted by a Canon 7D if Pentax don't offer something very special in their next semi-pro body, the continuous autofocus performance is blistering and almost rivaling the 1D MK3:
7D #2 In the Cold of Winter
Also down to £1244 - New Canon DSLR EOS 7D
The lack of autofocus in movie mode makes it a bit tricky to use, but I do enjoy making little clips with it, particularly with the 50mm f/1.4 for the awesomely shallow DoF.