I had the Architect Series 22 series machine. It was very quiet...except for the motor. To me, it made an annoying high pitched whine. It was the only part of the machine you really heard at all. But it washed pretty well, just didn't do all that good a job on pots and pans. To me, those machines always needed a second rinse after the main wash, which they did not have. Too often, it left debris on top of cups on the upper rack as they had done away with the top mounted constant rinse and just had a two level wash.
The machine arrived with a defective motor, so after a month, it had to be replaced. Both motors pretty much sounded the same. I guess maybe it was quieter than previous generation Superbas though.