Hi Frankie
The noise will lessen once the drives are run in.
I would recommend independent control of each drive, there would be no need for a bow thruster, as you would be able to, with practice make the boat move sideways.
I have used twin azithmuthing thrusters on my French Harbour tug and my new build is a Rotor Tug with 3 independent azithmuthing thrusters driven by MFA 800 motors.
I prefer this method of propulsion over fixed props with Kort nozzles, you have far more maneuverability, great for steering comps.
Great build.
Big-Geoff