Sift through a 38 page thread for an hour? Or post a thread asking and be told in minutes?
Onza Citrus pads are what I have, I've also had rock pad Greens working well on a smooth. If you've got the money the heatsink yellows that Damon has are quite possibly the greatest thing I've ever come across on smooth rims. He has the cnc'd backing as well, which definitely make a difference.
I've only used the citrus pads twice though so I'm hoping for further improvement