New laptop for University?

I've had this ASUS laptop for awhile now, and I feel like I need an upgrade as I approach my first year of university. I've really been doing some research on ultrabooks and laptops, and can't seem to find a better deal than macbooks.

Let me give some background information about myself:
-I'm a casual gamer, I play minecraft, league of legends, and on rare occasions some blizzard games (wow, diablo, hearthstone)
-I'm going into engineering, so I may require to run some simulation programs, etc.
-I'm going to require a laptop that is around under 5 pounds as I'll be moving around
-Battery life is important as some days I will have classes at 8:30 am and classes ending at 5:30pm, second semester I have classes ending at 9pm, but of course there are breaks between classes

Knowing this, I've looked into lenovo, ASUS, apple and also pondered if the programs I use are windows exclusive. Putting that into mind, apple does have bootcamp, which can run windows, and I do have a copy of windows 7. Nonetheless, I'm eager on hearing your opinions, advice, and suggestions.

Added (1). Budget would be under $2000, the cheaper the better I would assume, due to the crippling student debts that is to come.

ASUS X750JA-DB71 17.3-Inch
http://www.amazon.com/...cgamhar-20
Price: $748.00 & FREE Shipping
-Intel i7-4700HQ Haswell 2.4 GHz
-8 GB DDR3
-1 TB 5400 rpm Hard Drive
-17.3-Inch Screen
-Windows 8
-Email me at Thetechmech@outlook.com for more information /Choices.
New laptop for University