the best h100i

Solution
Well out of the 3 you'd want the H100i GTX as it's the newest and best performing of the 3 since the H100i v2 is just an updated version of the H100i. The GTX does cool better than the previous versions and you can confirm that by searching around but as I mentioned the stock fans tend to be loud but this can be adjusted once you create a custom fan curve. I replaced the custom fans with SP120 PWM high performance fans then added 2 more for the push pull. I've found that this setup along with a custom fan curve the fans never have to speed up at all allowing everything to stay really silent.
Well out of the 3 you'd want the H100i GTX as it's the newest and best performing of the 3 since the H100i v2 is just an updated version of the H100i. The GTX does cool better than the previous versions and you can confirm that by searching around but as I mentioned the stock fans tend to be loud but this can be adjusted once you create a custom fan curve. I replaced the custom fans with SP120 PWM high performance fans then added 2 more for the push pull. I've found that this setup along with a custom fan curve the fans never have to speed up at all allowing everything to stay really silent.
 
Solution