Laptop buying advice for college/gaming under $1000

So recently I've been looking at some gaming laptops and also for college
What do you think about this

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I was planning to go with a 15.6" because its lighter but i found the 17.3" very cheap and with nice specs.

Two questions and please dont post "notebookreview.net" or anything like that, i want from your own experience if possible
What is the battery life on the GT780DX 17.3" when using Microsoft word/surfing internet??


Also is there switchable graphics like optimus i think its called

Im also considering GE60 tell me more about it plz
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


I need to know on average battery life of both, from your own experience please. I have already read the website reviews

Im asking because its a 9 Cell Vs 6 Cell Battery.

Average hours the battery lasts on each laptop at say 50% brightness and surfing internet/ms word

VERY IMPORTANT: The GE60 has Optimus i believe so it can switch to HD 4000 to save battery life whereas the GT780 DOESNT have Optimus. How much percentage more battery life would the GE60 give me with optimus?


Also the GT780 is about 8.5 lbs whereas the Ge60 is 5.5lbs

How "portable" would u say the gt780 is?