You won’t like the price on a NP3 plated M4. I’d buy a black model and upgrade as you can. You can send it to Wright at some point and have it plated in NP3 if you want. It’ll be far cheaper than the premium they’re going for right now.
The Cerakote H2O is a bit disingenuous in my opinion. Benelli bait and switched this one with a lot of customers. I’ve met countless buyers who assumed it was Np3 plated since it had the H2O moniker. With the Cerakote model, you’re buying the look, not the performance of the NP3 original model.