1000 W is more than overkill even for sli GTX 970. That linked EVGA GQ series unit seems to be good, but can't say it for sure now. It is not listed on the psu Tier list:
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http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html
For that money you could a proven one from Tier 1, known as one of the best units. Look for Seasonic or Superflower builds, they are the best. EVGA have also some units made by them. They are EVGA G2, T2, GS line (and some other, look in the tier list).
GTX 970 just requires a normal 500 W unit or more. A good one can even be lower. I used an old 400 W unit to power my GTX 970 for one month. A sli setup would just require 700 W, if its a so so quality psu, just to be on safe side. So, its better to...