I would say an early GP100 is a good candidate for a "combat" revolver. My two older ones have what could be called grunge grooves under the extractor, so that small particles of debris, such as unburned powder, will be less likely to cause binding of the cylinder. Ruger makes a good, tough, reliable sixgun.
On a day-to-day basis, for concealment, I would rather actually carry my S&W Model 19 Combat Magnum. This is not idle speculation; I often do carry mine. I reckon it will not tolerate as many magnum loads, over time, as its slightly larger-framed cousins. That is OK, as my aging wrists will not tolerate too many magnums, either. I practice mostly with a Model 17, in .22 LR, and fire enough mid-level/mild magnums through the Model 19 for familiarization.
Regarding the excellent N-frame revolvers, I love their looks, but they are too big for my hands, and for the most part, I do not collect firearms just to look at them. If I had larger hands, and wanted to carry a revolver where extended combat might well happen, I might well opt for an S&W 25 or 625, and carry reloads in full moon clips, inside a sturdy protective pouch.
