Thanks for all your replies.
Few words about 1070s.
I got two in my pc (SLI) gonna use them and put back my old GPU,
dont have time to play on that pc so its not a big deal.
I bought those fairly cheap on after christmas sale,
don't want to search now for receipt but im almost sure that I paid even less than 400$.
One I bought few days ago on let's say local amazon/ebay (about 450$)
Other three i'm planning to buy in local shop so i don't have any problem with warranty,
but for those three I need to wait about 2 weeks (530$)
+5000$? Definitely not:)
Even if i will need to buy all of the GPU now from the shop (6x530$)
I will not paid more than 4200$ for rig.
Maybe if you want to buy "ready to go" rig then maybe you need to pay +5000$
but i'm planning to do all by my own (open air frame also) plus i got already three GPUs.
If I did not have that 1070s probably i will think more about rx 570 pulse
(they are in good price, atleast where i live) or other GPU.
But i think that for now I just want to go straight forward with the same GPU.
*all the prices are approximately, I just used my bank currency calculator