I'm used to it, such is the nature of the interwebsPeople aren't even paying attention. Most of the time they're just using the thread as a proxy to continue their arguments from whenever.
The monitor you linked is what I would get if I was getting a GTX 1080Ti now. Your setup is what I would get for 4K gaming and I wouldn't get anything less than it.
Feel happy with your choices, I like them, good luck and please let us know how it goes.
Will you be upgrading to Gsync 144hz 4k in 2018?
Edit: I see you're now leaning towards the ultra wide. Everything is a compromise imo until 4k 144hz. Once that comes out, it's a must upgrade to stay on the cutting edge for those with high end setups.
That said, I think the X34 seems the best bet right now for me, given it's a large monitor (34" which is what I want) and has a good refresh rate, has IPS, etc. The 4k 144hz monitors are a ways off and likely will be expensive for a long time, so I'm okay with 1440 for now.