I have all three. If there is by chance someone (by someone I mean a forum regular) who needs at least two of them hit me up. I'll be happy to grab one for you. (No profit is allowed. And if you try I will use Liam Neeson like skills to track you down and cut you in half with a light saber.)
I think its surprisingly well optimized, no doubt room for improvement, but the game is doing a shit ton of stuff... One loading screen, lots of effects, etc.
Messed around with a number of CAGs this morning in the beta. Mostly, just running Madison Square Garden/Hospital mission on hard, which I really needed to do to get gear. Gear drops this time around is, well, I wouldn't go as far as horrible but they are disappointing. (Hell, I still have one piece of green gear on because its better than the blue gear that drops. Weapons, I have two blue now. A a blue magnum that does less damage than my green handgun.)
That said I do wish one of my weapons was different type (I think I would really like to do an assault rifle and a LMG/SMG... but I'm stuck with a marksmen rifle and an assault rifle at the moment.)
Anyways, I'm still having allot of fun even with only one real mission to run and being disappointed in the DZ this beta.