how are acer aspire5755g laptop ?

Hello guys
Please tell me how are acer laptops in overall performanc I.e. Build quallity , heating issue
,services in India.
I am considering 2 models
acer aspire 5755g ci5. ,4gb ram ,2 gb nvidia 540m, 750gb @5400,win7 hp
acer aspire 5755g ci5,4 gb ram ,1 gb nvidia 540m ,500gb@5400 ,win 7 hp
please tell me the price of boy laptops
will 2nd model will be able to run cod mw3 smoothly at medium settings or shud I opt for 1 st model.
What really make difference btw 1gb vs 2 gb nvidia 540m .