Honestly as said above, just go for the cheapest one with 'decent' transfer speeds.
I was originally looking for 1TB and was originally just making a choice between the wd850, samsung 980 and seagate 530's and (when looking at reviews) there was so little between them you wouldn't notice but seagate normally came out 'just' on top in reviews but also cost more....
I'd settled on WD850's as they were the cheapest 1TB at the time but got insanely lucky and spotted 2x2tb seagate 530's for less than half price (yes real and sealed)...
Honestly in the games I play though I have noticed zero real difference between them and my old sata ssd's. Part of the issue is directstorage isn't really being used by much, if anything, on pc so I'm hoping in the future I notice a difference lol.
I haven't even been able to get close to the high numbers they quote in anything I've done outside benchmarking either...even as a scratch disk