You might want to take a look at clevo laptops! Almost everything can be replaced, including GPUs. You even get to choose if you want a more accurate display (ips, more expensive), glossy or matte coating, etc. The price also seems fairly good - you spend 1400€ and get the equivalent of a 2300€ toshiba laptop. I, however, don't have any personal experience with it. Sorry for offtopic.