In my opinion, most quiet and fastest acceleration trophy belongs to a GG1. I recall 30+ years ago riding the Broadway Ltd to New York. After the power change at Harrisburg to a single GG1, it literally YANKED the train out of the station. I was pushed back in my roomette seat as if I was in a high performance street drag racer (I had one several years prior). All I could think of was WOW! Not even todays' Acelas can lay me back in the seat like a GG1.