I would take coach to Newmar to have a look at the window install may need removal if not set in correctly.
Being the top of the line gas coach do not see why Newmar installs vinyl floors and not the heavy THICK vinyl tiles on floor , that I have in my 03 KSCA, the thin vinyl is to soft rollers will make impression over time and scratch's to easily.
Had a wood floor that we had to sweep before bringing in the LR slide because the stone grit would scratch or imbed in the surface.
Material under slide does not help either, dealer and Newmar missed that check.
The V-10's do become noisy when revved up maybe a better isolating blanket in dog house would cut some of the noise.
Not sure if the Banks air intake would cut down noise or increase it I know the CAI on my 8.1 Chev just makes my duels hummm.
But engine roars.