if you want a hybrid movie DSLR then the Sony SLT A-55 is the best way to go, with the phase-detect AF during video, def the best video DSLR of the bunch. Nikons continuous AF during video is contrast detect = much much slower than phase.
I'm really surprised to be the first to mention this - John?! -
, you even wrote an article on the SLT series and specifically talked about that feature.Only Nikon has that right now