Limbsaver, either Classic or Airtech. One of the few products I can confidently recommend to my friends.
Microcell -Made by Cervellati -- they make the pads for Beretta, Perazzi, Blaser and FN.- Distributed by Hastings
Dave Berlet made my recoil pads when he worked at Goodyear. It;s the best pad I've ever had, but he only made about 2 doz or so. I have three of them, one never on a gun. Maybe he can tell you about them.
Microcell. Best recoil reduction, cheap, easy to fit, and durable. Only potential downside is they aren't cosmetically as nice once fit since they have an open cell sidewall instead of solid material, although the ISIS pad would look the same. Much more effective than the ISIS pad as well
Best? Possibly. But, have you tried a Limbsaver? While I can't be so presumptuous to say a Limbsaver is the best....since I haven't tried every pad available....I can say that it's the best I have ever tried.
I like the feel of kick Ezz pads. When trying softer pads like Microcell ect. it was difficult to find the sweet spot on my shoulder. Guss
Phil knew a lot about spreading stuff besides recoil. I miss our heart's games. Me, him, Leo, and Bobbie Gilbertson would shoot the chain together and play hearts every day all day in between events.