Razer Stealth looks great, except for the integrated graphics.
Spectre has dedicated gfx (
https://www.notebookcheck.net/NVIDI...pecs-of-the-GT-1030-for-Laptops.223530.0.html )
XPS also has integrated graphics.
I can't vouch for games unreleased, and we're doing a little apples to oranges (operating systems), but if I lock my MacBook Pro (Mid 2015) to its integrated Intel Iris Pro, CK2, EUIV and Stellaris are all launchable and playable ( did a few minutes in each ). I also can't vouch for how they will play deep into the game when things slow down a bit.
The MBP's intel iris pro is roughly equivalent to a 720m, so far inferior to the integrated graphics of the machines you are considering which are supposedly closer to a 1030.
I think any of the machines you've listed would be fine for your purposes, and should they prove inadequate a couple of years from now, you could always explore the various eGfx solutions :
https://www.windowscentral.com/razer-core-dell-xps-15-guide
As this is going to be your primary *everything*, I would make sure you have adequate ram (the savings on 8GB isn't worth not getting 16GB) and storage. Video, music, pictures eat up space fast, spring for at least 512GB if you can. The HP comes in within budget for 16RAM, 512HDD while the other two are a little more expensive (Dell @ 1500, Razer @ 1600), with the Dell you can probably find some codes or deals if you don't need to jump right away.