Both the Sunon and Panaflo seem to be good quality fans. Of those two models listed, the Panaflo is quieter, but the Sunon flows more air. I have a 92mm Panaflo case fan now and it's been great. I also have several Sunon fans of varies sizes that all have been great fans.
Personally, I've had more Sunons in the past, including one 80mm case fan that has been running flawlessly for over 3 years now. Also, I now have a Sunon 80mm high output on my GlobalWin FOP and have been quite pleased with it. The CPU runs cooler and much quieter than the 60mm Delta fan I was using. Love it!
I'm not using any adaptor with my FOP cooler, I just allow the 80mm fan to overhang the heatsink a little. The wire spring fan retainer clips will stretch far enough to hold the 80mm fan, so there's nothing to make or buy with this cooling mod (except for maybe the 80mm fan).