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reply notifications have been buggy since HF19, I just look for new replies every 15 minutes or so of my "active" day

It isn't quite the same thing, but someone created a pretty good rig setup tutorial here:
https://steemit.com/ethereum/@spybit/how-to-build-a-gpu-mining-rig-cryptocurrency-ltc-eth-etc-xmr-zec-and-many-more

I, personally, would bump the PSU to 1600w and favor an AMD Ryzen setup; using the parts in my wishlist;

https://www.amazon.com/gp/registry/wishlist/26BLXY2M83LHS/ref=nav_wishlist_lists_2

But everyone has a personal preference ...