bigchief, it would get heavy after some time but unless you're a small guy you should be fine. i got the 14" so it fit better in my lap in the car. as far as the 1gb video it's probably mostly unnecessary as that gpu isn't powerful enough to take advantage of it.
preacher, they don't even compare. acer has always been a budget manufacturer. the specs don't compare, the performance won't compare. the one you're linking has intergrated intel gfx which is complete rubbish. i'm amazed you were able to play those games at all let alone well. not to mention the asus would have a better warranty if anything did happen.
while they don't use the games you mentioned you can see the performance is dreadful...
http://www.techreport.com/articles.x/14261/8