I'd say very nice indeed!
Have you seen this video on panzer grey colour modulation?
It's something I'm going to make an attempt at on a Tiger I'm currently building.
Perhaps it doesn't look realistic what he does - but it does look really nice, and a nice contrast to the heavily weathered tanks.
Also all tanks were at some point new and pristine. A crisp and clean tank, like yours, can look better than a heavily weathered one, and I would keep it crisp like that if I were you.