I just finished BSG, the whole shebang. It was awesome. Here’s a tip if you’re viewing the final DVD of season 4.5: Daybreak extended is like the Director’s Cut of Daybreak episodes 1-3. I was unsure if it was all, or part of them, and spent some time searching the internets for that info (carefully avoiding spoilers). So watch whichever you prefer, you’ll get about the same content told differently.