I still don't get why you seem to be ignoring the high-end, water cooled GTX 980 Ti's in SLI. The MSI Sea Hawk, Gigabyte Waterforce, and Asus Poseidon Platinum are without question some of the "best video cards money can buy", right up there with the MSI Lightning and maybe one or two others.
Quotes:
MSI GTX 980 Ti SEA HAWK
"If you are having trouble deciding on that video card to go with, the MSI GTX 980 Ti LIGHTNING and or the MSI GTX 980 Ti SEA HAWK, we can say without a doubt that if you have the room for the radiator the better video card all around is the SEA HAWK for the following reasons. It has liquid cooling built in, this provides a quiet operation with an extremely cool GPU that has the potential to be the best overclockable clock speeds. In addition, just at its base out-of-box overclock because of the liquid cooled GPU it is able to achieve a higher GPU Boost clock speed in games than any other video card, offering performance that blows away a reference GeForce GTX 980 Ti card's performance. The MSI SEA HAWK is able to do this in the size of a normal reference GeForce GTX 980 Ti not requiring massive PCB or heatsink sizes, making for a smaller package. The MSI SEA HAWK video card is more than worthy of our [H] Gold Editor's Choice Award."
http://www.hardocp.com/article/2015/11/16/msi_geforce_gtx_980_ti_sea_hawk_video_card_review/12#.Vl_A2PmrSUk
ASUS ROG Poseidon Platinum GTX 980 Ti
"When it comes to this price range, there isn't anything the competition has that can compete with it. The AMD Radeon R9 Fury X comes close with its custom liquid cooling solution, if only it could perform as well as the GeForce GTX 980 Ti then there might be some competition with the Poseidon. Alas, it does not, and so at $709.99 the ASUS ROG Poseidon Platinum GTX 980 Ti stands on its own. It wins in every way possible, better performance than the competition, under liquid cooling better temperatures, silent operation, better power efficiency and overclocking to the highest we've seen at default voltage period."
http://www.hardocp.com/article/2015/09/09/asus_rog_poseidon_platinum_gtx_980_ti_review/10#.Vl_CAfmrSUk
Gigabyte GTX 980 Ti Waterforce Xtreme
"Gigabyte's GTX 980 Ti Waterforce Xtreme Gaming joins the competition for the best GTX 980 Ti with a watercooling solution that's pre-installed, pre-filled, and maintenance-free. Besides its extremely long name, the card comes with a large overclock out of the box, on both GPU and memory, which makes it faster than any other GTX 980 Ti we tested so far. Compared to the GTX 980 Ti reference design, the increase is 21% at 4K, which is probably similar to the performance uplift we can expect from NVIDIA's next-generation Pascal cards. Compared to the GTX Titan X, the Gigabyte GTX 980 Ti is a whopping 14% faster - at a fraction of the price. AMD's Radeon R9 Fury X is 17% behind, and the gap widens to 20% at lower resolutions. Overall, this makes the Gigabyte GTX 980 Ti Waterforce the fastest GTX 980 Ti we tested so far, slightly ahead of MSI and ZOTAC."
http://www.techpowerup.com/reviews/Gigabyte/GTX_980_Ti_Waterforce/28.html