Just got my two brand new 1080 FTWs from RMA. I also bought a Titan X Pascal while I was waiting for these to arrive. The SLI cards will out benchmark the Titan and give more frames, but not by too much. Given the hit or miss support for SLI in games I'm not sure it's worth it. I can OC the Titan with a Hybrid DIY mod and get great results. The FTWs would be left on air because I don't want to have two more radiators in the case.

Display is an Acer Predator X34 @ 3440x1440 and 100hz.

Mobo is Z170 so I'm limited to the SLI cards running at 8x each only thanks to Skylake.

The kind of problem that only rich people can have :D
 
I would  resell the Titan and one FTW. buy the 1080 ti later and resell the other FTW :D

Keep the TXP, and sell the SLI 1080's if you can.

Yes.. sli on the newest games don't happen this year so far! I'm pretty upset as I have ever 2 1080 classifieds water cooled and all its good for is benchmarks!! I'll give it a few more months and then it's time to sell one!

Also the last thing you want is 2 non foundation edition cards in sli as they will cook eachother on air!

So to me it's an easy call there.. stick with the Titan xp. Wish I would of went with thst myself now.