Personally, I'm still not getting New Vegas until I own the console version. Or until the GOTY edition comes out. Either way.
I got Fallout 3 on Xbox 360, loved it, found out about the mods for PC and got the PC version. Still lovin' it.
Did the same thing with Oblivion, but that's a topic for a different thread.
Also, I've never really played the original Black-Isle Fallout games (I don't like turn-based games; too slow paced), but if I hear enough reasons to try them, I will.