I have AR catless on my IS and I am not a big fan as it is too raspy for me. I am hoping to get resonators installed soon. It is so loud right now when I start up in the morning.
BTW, I had AR in my previous 335i with stock exhaust and I loved it
Current: 1987 E30 325is, 1997 E36 M3, 2015 F80 M3
Past: 2011 E92 M3, 2011 E92 335is, 2008 E90 M3, 2007 E92 335i, 1995 E36 M3