I really wouldn't know how to recommend anything specific. Though, after a quick look at some suggested setups the CM MB511/520 seem like a neat pick (RGB version if you want the fancy fans right away).
I have also seen a similar setup to yours where it is recommended to drop the stock cooler, a pretty poor one as far as I have read, and go for something like this, Arctic Freezer 34 eSports DUO.
Other changes were the GPU (XFX Radeon RX 5700 XT RAW II 8GB GDDR6, on a 350€ prom price though), the RAM (2x8Gb Corsair Vengeance LPX 3200Mhz CL16), the MB (Gigabyte B450 Aorus Pro), the PSU (CM MWE 650 80+ Bronze 650W) and a different SSD setup (one 1Tb SSD M.2).
Maybe some of this helps to adjust yours.