Yes, I thought about the 3600 but the cooler that comes with the 2700x is the wraith prism so it will cool the VRM aswell and I will be sticking with the prism for a long time, atleast until I change the motherboard to start overclocking in the distant future. Also the +2 cores is a bonus in the long run.
And yes the a320 I have has RAM overclocking. I currently have my 2 8gb sticks on 3200mhz cl16 (standard XMP profile)
It also has PBO for zen+ and zen2 procossors after a BIOS update.