You know what, if you enjoyed Fallout 3 that much despite its own myriad of bugs then yes, buy this game immediately.
I probably logged 300+ hours in F3 and I can say, with no exaggeration, that New Vegas is a far superior game in nearly every aspect to Fallout 3. I haven't even beaten the game yet and it's that apparent.
I've experienced a few crashes, one follower glitch, some NPCs acting funny, and one quest out-of-order. In my mind the problems have been overshadowed by how much better the dialogue and wit has been. F3 was more of a depressing game, in NV there quite a bit of humor laced throughout.
Yeah, they totally should have delayed the release to squash lots of bugs, but fuck it...still a great game IMO.