Lightweight Gaming/College Laptop?

I'm an incoming freshman looking for a relatively portable (sub 5 pounds) laptop that can handle some gaming for at or under $1500. I'd love any help you can give in my search. Here are my criteria:

1. Weight: Has to be less than 5 pounds so it's not a burden when I have to bring it to class.

2. Screen: Preferably 14" or 13", but I could go up to 15" as long as it's still under 5 lbs.

3. Games: Has to play games like Skyrim, Bioshock Inifinite, Far Cry 3 at low/medium settings. I don't mind if it doesn't look absolutely spectacular as long as there's little lag and a solid fps.

4. Brand: I've been looking at mostly Lenovo and MSI. I'd also consider Asus and Dell. I'm looking away from HP and Acer because of concerns over their sturdiness, but would be open to suggestions. One computer I've already found is the Lenovo Y40, which I can get for $829-$1299 with a student discount.

I appreciate any suggestions you have!

HP Spectre XT TouchSmart Ultrabook 15t-4000 (Silver)
http://www.amazon.com/...cgamhar-20
Price:$999
Intel Core i7-3517U 1.90 GHz
8 GB DDR3
500 GB 5400 rpm Hard Drive, 32 GB Solid-State Drive
15.6-Inch Screen, Intel HD graphics 4000
Windows 8, 5.25-hour battery life
Lightweight Gaming College Laptop

Best Gaming Laptops Under $1500:

1. ASUS ROG G750JM-DS71 17.3-inch Gaming Laptop, GeForce GTX 860M Graphics

- Intel Core i7-4700HQ 2.4Ghz (Turbo 3.4 GHz)
- 12 GB DDR3
- 1 TB 5400 rpm Hard Drive
- 17.3-inch screen, GeForce GTX 860M 2GB
- Windows 8.1, 3.5-hour battery life

See More Features and Price: http://www.amazon.com/...00IKF2H12/

2. MSI GT70 Dominator 17.3-Inch Gaming Laptop

- Intel Core i7-4800MQ (2.7 GHz, 6 MB Cache)
- 8 GB DDR3L SDRAM
- 1 TB 7200 rpm Hard Drive
- 17.3-Inch Screen, NVIDIA Geforce GTX870M with 3GB GDDR5 VRAM
- Windows 8.1

See More Features and Price: http://www.amazon.com/...00IMTQ6I6/

3. Lenovo IdeaPad Y510p 15.6-Inch Gaming Laptop: http://www.amazon.com/...00HIY8TNQ/

4. Alienware ALW17-5000sLV 17.3-Inch Gaming Laptop: http://www.amazon.com/...00IMUAYLU/

Check Also | 10 Best Gaming Laptops 2014: http://www.wiknix.com/best-gaming-laptops/