I have found that rarely (if ever) there is one holster to fit all situations. Field holsters are generally not conducive to effective conceal carry.
I find that a pancake style holster offers better support for larger/heavier handguns. By distributing the weight over a larger area, the gun will have less of a tendency to "flop" out from the body. The larger/heavier the gun, the tighter you want it to hug your hip.
I use a Galco D.A.O. for field use and a Bianchi #7 for concealment. I actually prefer thumbsnaps or other retention device for conceal carry as it offers a degree of security in case of a scuffle. With proper training and practice, it is essentially as fast on the draw as an open top holster.
That being said, I tend to like to support the "little guy" and have done a lot of business with Haugen Handgun Leather and highly recommend it. Jerry is top notch. http://www.haugenhandgunleather.com/
I just received a 5906 IDPA rig from Roy at Lobo Gunleather today and find that it is very well made and priced very well. He is only 3-4 weeks out and has the best email communication I have come across. I plan on doing a revue of this setup shortly. http://www.lobogunleather.com/
Lemat thank you, you have been most helpful.
I'll check all that out. I think I'm leaning towards Desantis Leather for a duty rig. I'm a P.O.S.T. Firearms Instructor and would like to carry it on the range to teach when I'm not carrying the Colt.
Another gentleman had the same question about a 686, so I just copied my answer for him:
After trying a box full of uncomfortable holsters for my Glock 21 I finally found the Fobus paddle holster. Easy on and off, and really comfortable. So I went ahead and got one for my K-frames (10, 19, 66). I also got one for my J-frame, but never use it because I just carry that one in my pocket.