EVGA for a reference card design: They do the best reference cards and also provide the best support. They also include a 90 day step up program where you can upgrade your card within that period there are rules and things you need to do to take advantage of that but you can upgrade/exchange with them for a better card.
Gigabyte: They make good cards but lately I haven't liked them. I called them once and I felt like I was calling a run down Asian Restaurant. The lady that talked to me wasn't very knowledgeable and she informed me that a RMA would take 3-4 weeks turn around with them which made me a little nervous.
MSI: Makes amazing coolers, typically good quality, and more equipped on the card end to overclock chip is still subject to the silicon lottery.
Asus: Makes quite and cool cards, they also like MSI supply good quality components, and normally are equipped to overclock well.
So its up to you.
I would go with EVGA for reference, and then MSI/ASUS depending on which you prefer.