Best Laptop for a University Student

I am in need of buying a new laptop since i wont be able to have my desktop with me.

USE: Apart from Internet browsing and word processing, i will be using it for some light programming, watching movies/videos and occasionally some *gaming*(I am not a hardcore gamer, i am fine at 40-50fps on games such as DOTA 2 and Team Fortress 2)
The laptop must be around 15.6'' any bigger would be inconvenient mobility wise, smaller would hurt my eyes
It needs to last 4 years to get me through studies.
I have no preference for OS.

I have done some research and found possible candidates, which i will list below.
Any suggestions on different laptops at a similar budget are more than welcome.

A: DELL Inspiron 5558
15.6΄΄ HD Truelife LED-backlit (1366 x 768)
Intel Core i7-5500U 2.4 GHz (4MB Cache)
8GB (2 x 4GB) 1600MHz DDR3L Dual Channel
NVIDIA GeForce 920M 4GB DDR3 dedicated
1TB 5400rpm
Rest is irrelevant to me

B: LENOVO G50-80
15.6΄΄ FHD LED-backlit (1920 x 1080)
Intel Core i7-5500U 2.4 GHz (4MB Cache)
8GB 1600MHz DDR3
AMD Radeon R5 M330 2GB dedicated
1TB, 5400 rpm
Rest is irrelevant to me

C: HP 15-ac007nv
15.6΄΄ HD BrightView WLED-backlit (1366 x 768)
Intel Core i7-5500U 2.4 GHz (4MB Cache)
8GB (1 x 8GB) 1600MHz DDR3L
AMD Radeon R5 M330 2GB dedicated
1TB, 5400 rpm
Rest is irrelevant to me

D: HP 15-r221nv(Budget choice)
15.6" HD BrightView WLED-backlit (1366 x 768)
Intel Core i5-5200U 2.2 GHz (3MB Cache)
6GB (1 x 2GB, 1 x 4GB) 1600MHz DDR3L
NVIDIA GeForce 820M 2GB dedicated
1TB, 5400 rpm
Rest is irrelevant to me

I hope you can get me some quick replies because i am in a hurry