What 4k 40inch or so Monitor to get

So I just built a 980ti PC and I'm looking to upgrade from my 1080 to a 4k panel and after seeing the AMH A399U on Tek syndicate I said that it was perfect, but I want to know if there are any other options in the field. I don't care about price right now I just want to know what all of my options are, so long as they are in that 40inch 4k display area that is suitable for gaming.

I was actually looking at a couple yesterday on Amazon. The WASABI MANGO UHD420, Crossover 404K UHD LED 40 Inch UHD Computer Monitor, and Seiki Pro SM40UNP 40.0-Inch 4K LED-Lit Monitor. I haven't look much up on them other than the customer reviews on Amazon.

Hi ! for gaming in 4k, I love, however the up-scaling from 1080p to 4k (just setting resol at 1080, and since it is a 4k, it will automatically up-scale. The only game I have problems with is Crysis, but I think it is a soft problem and not a hard one. I am looking at a crossover 404k , side by side with a A399U, less reflections on 404k , but there you see that there is not that much diffrence; they both reflect in a windowed office or room. THERE is nothing like night, darkness, to get the maximum out of both monitors. Wasabi and Philips do not seem to get good reviews , and seiki is in between . IMO the A399U and Crossover 404K are in a category of their own, seeming that they give more results for a very decent price.