I'll be on the fence about this one till reviews. I've lost interest a lot in the Call of Duty games since MW2. I've had a lot of people mention to me that BC3 is a pick over this for them since they didn't creat a new engine or anything. I'm not one to trash talk a game till I've read a review and played it myself though. I do like the WW3 theme though and enjoyed the trailer!
I'd go with the Acer. I just picked up a laptop myself for under $400, just for soemthing to have in the living room to surf on, play videos and music. Nothing crazy, AMD Athlon II 2.2Ghz with 4GB DDR3 ram, also came with Radeon 4250....hey....I can play half life 2 at medium settings! And Oblivion...lol. I'm gonna try out Deus Ex in a bit see how that runs! Butyeah go with the Acer, would be your better bet.