Hey man, I just bought a new Asus laptop and I think it could be exactly what you need.
It's super thin, light weight, ideal for school work, excellent battery life and overall it looks very clean:
ASUS R516UX-DM166T
256gb ssd
i7-6 gen
Nvidia 950m
8 gb ram
15.6 inch
At first I aimed to buy a 14 inch laptop, mainly for study / business purposes but also with good performance for occasional gaming.
I found good options and also considered 2 in 1's. But most of them are rather expensive compared to 15-inch laptops in terms of specifications.
Shifted my focus to 15 inch laptops with ssd and i7, and found this one. I got it for €999.
It doesn't feel big at all and is actually perfect.
When I am reading pdf's, going through powerpoints or working in excell, the 15inch really makes me feel more comfortable than a smaller 14 inch. Things are easier to see and it's more relaxing for my eyes. Working in MS Office is also better when I have the numpad on my keyboard. 14 Inch doesn't have this. Could be useful in your field of study as well if you work a lot with numbers, but can be personal preference.
Also, if I do have some time to game a 15inch is doable for me to play TF2 and other games.
It runs GTA 5 smoothly and also Battlefield 4 runs perfect.
Since I bought this laptop I've been using it to study a lot, and when I come home from work my dad already claimed it to play gta 5... It doesnt overheat and performance is really good.
Definitely something you could consider.. Good luck