On a side note before I go:
**********SERIOUS SPOILER IF YOU HAVEN'T FINISHED SEASON 3*********
So we know who 4 of the final 5 cylons are now, gotta say the realization moment of their calling and their way to the spot where they met; was amazing and breathtaking in every sense, Gosh the music got the build up to be so intense, with that acknowledged and appreciated I also gotta say that seemed like a banged up rushed job picking these 4 people, it's like they simply just wanted faces we already know, almost like they were picked randomly, how long has the Cylons had the skinjobs? since before the first Cylon war?! it must be because Adama knew Tigh back then.
All the other choices seemed lame and misplaced, except for Tory, that's the only choice that seemed special and creative, we really never looked deep into her character yet we saw her quite often, great fit.
Also the Cheif's reaction was nowhere near expected after his own previous struggle with the subject matter and doubt of being a Cylon in season 2.