I dunno, the Centurions from Razor were basically the ones from TOS but 3D, not to mention they're seriously ass ugly, I think I prefer that fourth image to them.
EDIT: And is it just me or does that second image look sorta like an Asari from Mass Effect but robotic?
Those Centurions are canon, like them or not - regardless of their TOS originis, they are the original Centurions as established in "Caprica" and seen in "Razor" and "Daybreak". They're even in the painting in Adama's quarters on the Galactica. The new design in that fourth photo could be for some other function, as speculated already, or could be a second generation Centurion, with the tall models we saw in the majority of the new BSG being a third or later generation. As long as B&C doesn't use that design as the predominant Centurion model of the war, then continuity might not be harmed.
The Raptor image is interesting - to the BSG modern Raptors as the Viper MkII is to the MkVII. It looks a lot like it's flying through a Battlestar flight pod, the shape of which resembles more the Mercury Class' than the older ships, but being mere concept art, I suppose that's incidental and not necessarily a plot line either.
Like StarSlayer, I'd be keen to see some planetary warfare, not just the fleets and fighter slugging it out in space - we know there were land battles, so I hope to see some.