I've been looking at these two MB's for a hot minute to pair with my Meg 700R case. But I can't decide on which, I'm leaning towards Carbon Wifi 2 judging by the way the PCI-E lanes work. Price wise they're pretty close currently.
https://us.msi.com/Motherboard/MPG-Z790-CARBON-WIFI-II
https://us.msi.com/Motherboard/MEG-Z790-ACE
https://us.msi.com/Motherboard/MPG-Z790-CARBON-WIFI-II
https://us.msi.com/Motherboard/MEG-Z790-ACE