With the current difference in price, i don't see why you shouldn't just buy the GTX970 instead, it's much cheaper and comes just below a single 780ti in performance, even if you're a 1440p gamer this will do you well.
The 980 is only a little over 10% faster overall in 1080p, little over 15% for 4K and it's over 50% more money out of your pocket. link for info:
http://www.tomshardware.com/reviews/nvidia-geforce-gtx-980-970-maxwell,3941-16.html
then buy another GTX970 when you have the money.
I know it's a good buy compared to last gen when you're looking at the GTX980 vs GTX780ti, though compared to the GTX970 it's nothing.
No matter which card you're going for, i can tell you this.
EVGA is probably a pretty nice card, though it's not quiet and the card tries to keep itself very cool instead of going for silence
MSI is the exact opposite of this, though the cards still run pretty cool, these are also great overclockers
ASUS is the quality brand probably, runs pretty damm slow at stock, overclocks but not as good as MSI, will turn off fans when idle.
Gigabyte i don't know much about
I would get a MSI or ASUS GTX980/2xGTX970 if i where you, and i would buy a SLI GTX970 setup instead of the GTX980.