What stock Hackintosh'able machines are floating around that would be comparable (or better) to a Mac Pro 2010 with 12 core 3.46 GHz Xeon processors?

I'm in a pinch to replace a dead Mac Pro (5,1) with 64 GB RAM. I don't really have time to pull the components together for a custom build for this and would prefer to just buy a base system that I can throw RAM and an existing RX 580 into and run after a solid/clean HackOS install. Any particularly decent machines stand out in this category?