Blackhawk Serpa CQC, or a quality leather holster. I like Galco Gunleather, and Don Hume, although there are a lot of good holster makers out there (DeSantis, Bianchi, Kramer, Milt Sparks, El Paso Saddlery, BladeTech, SideArmor...the list goes on and on).
In IWB holsters I would encourage you to avoid the simple metal clip designs, and go for snapping loops or the hook clip style the Galco uses. I will say that I haven't seen alot of good concealed rigs that also carried a magazine on the holster. Most sell seperate magazine holder(s) which are usually worn on off gun side.
Good Luck with your search, and let us know what you decide.
DeSantis Tuck-This 2
Blackhawk Serpa CQC.
Don Hume JIT Slide