I hate schilling for Dell, mainly because I couldn't get an i7 without getting gouged on a bunch of other stuff I didn't want or need (so I took the option $500 cheaper)...but their QHD screen on the Inifity displays is rated the best on the market.
The problem is, with Dell and almost everyone else, the high-end specs are bundled which means you are getting gouged not only for a top feature, but several other bundled features you might not want. I think all their margin must be in the top-tier devices, probably like 25% - plenty of money can still be saved building your own high-end PC, but you can't build your own laptop.
So I skimped on the laptop, deciding if I need more power I'll remote connect to my home desktop.