Kaby Lake build for dual 4k on High Sierra

[ericNdfw]

I have Kaby Lake i5 that I'd like to build on and am looking for advice on motherboard and graphics card:

1. I've had trouble with my current ASUS Prime Z270-AR during my first, failed hackintosh install on it a while ago so I'm open to upgrading to one of the Customac recommended MB's.

2. I'd like to get the quietest possible graphics card that will still support dual 4k monitors at 60hz (using dual DP). This is going to mainly be a casual photo editing Mac (family stuff, nothing professional) so I'm hoping not have to spend a lot here but there are so many options that I'm not sure where to start.

Any help is greatly appreciated!

 

[ericNdfw]

... PS: If it's more cost effective and/or a lot easier for High Sierra, I'd be open to upgrading to a Coffee Lake chip

 

[Shawn911]

... PS: If it's more cost effective and/or a lot easier for High Sierra, I'd be open to upgrading to a Coffee Lake chip

I'm also in the search of cheapest dual 4k@60Hz gpu for High Sierra. It seems Quadro P400 is the option.