Brands, types to try out ....
For a full size or compact M&P pistol, you have a few brands or choices for a well made IWB holster.
I myself like the strong side OWB style with a regular straight drop. I used to carry guns with the FBI cant but now I just use the straight holster angle. On occasion I use cross draw carry but it depends on my activity or attire that day.
Brands I'd look at include; Galco, Safariland, Blackhawk, Alessi, Wright Leather Works, High Noon Holsters, Mitch Rosen, Mernickle, R Grizle, Don Hume, Milt Sparks, Kramer(Greg Kramer), Blade Tech, G Code, Kirkpatrick Leather, Ken Null, Redstone Concealment(AL).
For your information,
www.highnoonholsters.com has a 10% off summer offer. It ends in 08/2015.
I might buy a new Baseline Kydex holster for my Glock 21 gen 04 .45acp pistol.
Milt Sparks is widely known for the IWB Summer Special model. Some advise using holsters with Chicago screws like the Kramer styles for IWB. They say it lasts better and wears longer than snaps.
If you see a IWB holster you like, contact the shop first to be clear on prices, fit, delivery time, orders, etc. Some custom makers are slow or have back orders.
Many gunners like holsters made of horse, shark, rhino, gator, snake, etc. These exotic holsters are expensive but look sharp.
Rusty