I think I've bought, traded or sold as many holsters as razors i think.
In the end the best concealment for me is straight in my pants at 1 o'clock during most of the year. Second is an el cheap
Don Hume JIT slide. And for those winter months I use a
Alessi CQC/S. BTW, Glock 19 is my daily carry when I leave the house.
Tucker also makes some gorgeous top quality holsters.
In the end it will all depend what gun, your build, circumstances/occasions to be used. It's all a very personal choice.
In a way it's very similar to finding that perfect razor that works for you.
The best investment I've ever done are the
bullhide 1 1/2" gun belts.
Good luck with your new AD.