"Loud" is not a word that goes with Graphtec machines. Servo motors are quiet. They are gliding along, not stepping. You can use 751, but most people use matte vinyls inside to avoid the glare of lights on it. It will be harder to remove later. It's your choice what you want to use.
You can go on youtube and find videos of a Graphtec cutting vinyl, and hear how quiet they are.