I am a leather person, I have used and liked the Mitch Rosen Clipper (not tuckable), now I'm using a HBE Pro-TL which is tuckable. Both are thin, light, comfy and high quality.
The HBE Pro-TL has ended my "journey" for IWB, and for OWB, I'm all set with the Alessi Belt-Slide
... so my holster-shopping "fun" for my PM9 has come to an end...
LOTS of good feedback on the comfort of Crossbreed / Comptec so you won;t go wrong with them, I just haven't considered non-leather rigs. I also have used Tucker "Cover Up Plus", very nice holster but personally I found the leather is too thick for small gun like PM9, I think it is more appropriate for large guns, however, LOTS of praise on his new line "Silent Thunder", you may want to take a look.