vapour :
Sure, pick any case you like and pick an X370 MB you like. If you can wait, Zen2 is releasing next month.
I wouldn't say "pick any case" because there is a lot of junk out there. I would say this - there are good vendors to pick from and vendors you should avoid at all costs.
Good vendors:
- NZXT
- Corsair
- Phanteks
- Fractal Design
- Cooler Master
- Antec
- Inwin
- BeQuiet!
- Thermaltake
Vendors to avoid at all costs:
- Apevia
- Raidmax
- Xion
- HEC
- Ultra
Then there's a few that are of questionable quality like Azza, Sentey, DIYPC, Deepcool, and so on. But I would definitely pick from the "good" column first before moving anywhere else.