I'd rather see another movie win over Basterds. I've seen IB 3 times in theaters and I'm confident when I say it's QT's most uneven film. It's like it has no spine to hold it together or something. There is a very huge gap between best and worst scenes from this movie, something which I haven't witnessed with any of QT's films before.
Actually, the main reason why Basterds is a notable QT movie is because of the ballsiness of History reenactment and the fact that it turned out so well. I really, really loved the whole idea behind IB, but it really felt like it should have been a book more than a movie. And while it is his best script yet (IMO), the process of turning words into life didn't turn out as well as it should have, even if most of the actors were perfect in it.
For this reason, I think there's a lot of categories in which IB should be rewarded (Best script, for a start), but I'd rather wait and see a real complete, square, awesome, and 200% finished-with-no-rush film from QT win an Oscar than IB.
I'm saying that even if, in my opinion, IB was the best film this year, hands down. Also, I'm sure he'll win one someday, that's what I'm all for the "wait for the perfect movie".
I'd still be happy if IB wins it, but that'd put in jeopardy his possibility of having his
truly best film rewarded.