My favorite holste TDKR everything is my Raven Phantom. It is my everyday carry holster and therefor my IDPA holster, too. I have a total of the Phantoms, one for my Glock 21 and two for my different M&P autos. Cannot say enough good things about Raven.
Do not overlook the Glock Sport/Combat holster. That is one great holster and one that I used for EDC and IDPA. I still have two of them, both with a lot of miles on them, and while I don't use them because of the Phantom, I wouldn't get rid of them for any reason!
Glock 21 Club member #1109
NRA Life Member
WSSC of Indiana Member