Quietest gears? Yukon? Strange? Motive? Richmond?
Just so you know, Motive bought Richmond so if you buy Richmond's your actually just paying for the name. I recently bought a set or Richmond's before I knew this because my prior experience with them was always good. They were real touchy getting set up but once I zero'd in on it they have a good pattern.
I noticed Randy's Ring and pinion has a chart of different gears pointing out that some gears are noisy.