Maybe I will post all the parts, without the GPUs.
Gigabyte GA-X99M-Gaming 5 - 992 PLN.
Intel i7-6800K - 1996 PLN
Kingston HyperX 16 GB 2800 MHz Savage Black CL14 - 486 PLN
Lite-ON iHAS122-14 black - 49 PLN
SilentiumPC Alea M50 - 219 PLN
Corsair Hydro H80i v2 - 439 PLN
Arctic Cooling MX-4 - 25 PLN
Crucial BX200 480 GB - 499 PLN
SilentiumPC Enduro Gold 650W - 399 PLN
Steelseries Apex M800 - 699 PLN
Logitech G502 - 299 PLN
Windows 10 Home Box 499 PLN
Wanted to build best possible computer with lowest possible cost envelope and thermal envelope

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Which parts are best for this setup? GTX 1060 or 1070? I would play Overwatch more casual compared to Heroes of the Storm.