I currently use the Safariland 6280 as a duty holster. It has lasted over five years now with no negative results whatsoever.
I have also used (and am intimately familiar with) the 070, also known as the SSIII, triple retention holster. To me, it is the holster everyone else imitates. Together with good weapon retention skills, I feel very confident in the security of my duty weapon using one of these holsters.
Hiding in plain sight...