Was looking at this mb and a aurus mb. Should I go with 3200 mhz mem or maybe faster?
I'm not sure about that. 3200MHz RAM should do the trick. Look at your motherboard's QVL to see what RAM is pre-qualified (and guaranteed) to work properly with it.
I have four 8GB sticks of 3200MHz GSKill Ripfarts here that I can go to if my 32GB of GEIL Super Luce 4133MHz doesn't work out for me. But I hope that the GEIL works.