I'm Starting to lean towards your list you posted inc the Zotacs. However 1 thing I'm still worried about is the board, what with the heavy cpu cooler and TWO big ass zotacs I dont want it getting bowed and the gpus to sag to hell, Thats why I chose something with a reinforced back plate in my build.
Also I need to do more research as I'm no expert, the M.2 SSD is most definitely faster but when I said lackluster I meant the storage space, I know its an SSD but with Win10 wouldnt it be better for something with more capacity?