That Crosshair is a very nice MB and I agree with dave, 16 GB of RAM is plenty for at least the next 5 to 7 years unless you use some specific software that benefits from more RAM.
How much RAM do you really need? It's a question that plagues many PC buyers, and in this guide, we break it down for tablets, laptops, and desktops.
www.digitaltrends.com
As for MB Brands, I have also used boards from pretty much Every MB manufactuer over the last 30+ years.
I research each MB based on the current application.
Each manufacturer has good and bad MB's IMO.
I currently own an Asus, for my last build I used a Gigabyte, and I had an MSI board before that.
My advice is always research current board reviews and choose the best MB for Your needs/budget.