Don't buy a shitty alienware.
I was in the same situation as you.
I was deciding between the Samsung 7 Series Chronos NP700z7c or Lenovo Ideapad y510p.
I went with the Samsung and I absoutly love it.
Check the specs here.
https://shop.lenovo.com/us/en/laptops...-series/y510p/
https://www.samsung.com/us/computer/pcs/NP700Z7C-S01US
I love my Samsung, but if you want better graphic power go for the lenovo y510p with SLI 4GB 755M.