Mw3 for me, stick to what you know
I'd never tried Bf Before so I got the bf3 beta. Unfortunately it was full of bugs and all that happened to me was that I fell through the ground! I know the full game will have fixed these issues but sometimes first impressions are important! If I had the money I would probably get both, but I don't so I'm sticking to what I know. Plus I want uncharted 3, saw a review for it yesterday, wow!