I just bought a 15.3" laptop (would've gone for a 17 incher but OMG the prices in Poland get crazy if you want to move up to that size...)

I would recommend that you look on the bottom, if you have physical access, of the laptop and make sure that your laptop has proper screws and not rivets or whatever the word "plombowany" would translate to :P The reason for that is you will void your warranty if you remove the rivets whereas the screws can be easily removed and replaced.

This is useful if you are planning on adding more memory to your laptop down the road like I am.

As for games my current laptop can handle The Witcher 3 on whatever settings the GeForce Experience application sets them without a hassle.

My laptop's specs:

Intel i5-7300HQ @ 2.50 GHz
8 GB DDR4
Nvidia GTX 1050 4 GB VRAM
1 TB HDD although I hope I can swap it out for an SSD somehow

Hmmm you want reals PLN or in USD? :P

I can say mine was a bit over $1000, somewhere around $1100, give or take a few dollars due to currency conversion rates and all...