Same helmet here, i bought the medium smoke visor from shoei and i'm really pleased with it, helpfull with sun and not so dark to be a problem on night ride or in a tunnel
The dark smoke maybe is even better with sun, but too much dark for me, don't wanna go with two visor and have to change it every time the light is poor
And the NXR medium smoke visor is enough for summer sunny days?
Here in south Portugal, summer sun is blazing strong :-(