I could lock up either wheel with OEM, no real need to 'improve' on them. Having said that, when I went in for pads this past summer, they were out of OEM, but had some Green Stuff pads on hand. They work fine.
I installed EBC FA174HH Sintered rear pads and
EBC FA196HH Sintered front pads. I felt a difference in performance immediately.
I'm really heavy, like riding double. No brake fade at all. Only thing not perfect for me is
applying front brakes results in a weird buzzing sound which is diminishing with use.