I have an Ncase M1 aswell and ran some quick stress tests to see the temps.
For reference below is my specs:
Ncase M1
R7 1700 (stock)
Cryorig C1 (with a Corsair ML120 Pro)
2 x 8 GB Corsair LPX @ 3200
GTX950
2 x ML120 as intake
1 x Noctua NF-B9 PWM as exhaust
The fans curves have been set...