I really like that asus board but I'm not sure about microATX in general and especially with the CM 212+ and lots of ram.
The ASRock you recommended looks good and has a lot of features, when I previously built my pc 3-4 years ago ASRock wasnt a great brand is it better now? and worth almost 300?
MicroATX is fine, you just get fewer PCI lanes. Frankly I don't think the ASRock is worth 300. I only selected it for the red/black thing. If you don't care about it being blue tr the P8Z68 PRO/GEN3 from ASUS