DDR4 2666, 3000 or 3200 for Ryzen 5 2600

Hi all,
I am looking to build a new system based on a Ryzen 5 2600. I have all my parts selected except the ram.
I've gone for a Asrock B450M Pro4 MB, a 250Gb NVMe M2 and CPU AIO cooling (due to hot summers in Rockhampton QLD). I want to know I can get the best out my system without going all highend parts.

Am I wasting my money buying 3200Mhz ram or do I just go good quality 3000Mhz.

Money is not the issue as there's really only $30AU difference, its more about the performance.

Cheers!
 
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