I'll definitely have to go with X570 (or if cheaper X470) with Ryzen 2, as all other boards based around the lower tier chipsets are actually far more limited when it comes to their from-PCH PCIe slots than my Z97 Sabertooth MKII...it only has the Asmedia USB 3.0 controller disabled when the x4 slot is used. 

Pretty much all non X570 AM4 boards have all PCIe x1/x4 slots disabled if their m.2 slot is used, or 2x of their SATA ports disabled (both scenarios for dual m.2 boards).

And I need both the PCIe x1 slots and 2x SATA ports, as I'm currently using them all on my current board (I could actually do with 8 SATA total - SATA II card for my ODD ATM).