I have SLS Side mount and I hate it. It clanks constantly. I had awr mounts and they rattled my dash to death. I have also had stock filled mounts.
I recently ordered medieval mounts. They are definitely the way to fly. You can't beat the price with a stick either. http://www.medievalllc.com/news.php
if it is a daily driver and you dont want some ANNOYING vibrating, i would get front and back CorkSport inserts.