I used to carry two Case medium stockmans, one a Red Bone and one with Brown Bone. Both these knives served me very well, I only stopped carrying them because I became worried if I ever accidentally dropped them, what with their bone handles.
I own a Camillus #67 stockman that is very solid/well-made, with stainless blades. Strangely, it has an odd smell to it, and my hands smell after I handle it a lot (came from the box that way).
I have owned a few Schrade stockmans, in both carbon and Schrade + stainless. Their carbon blades seem to come much sharper out of box than their stainless, but all are solidly made.
My favorite as far as pure use with less worry about maintenance are the Buck versions, the 303, 703, or even the 301. Each blade on the Bucks has its own separate backspring, so the blades aren't "crimped," or bent to accommodate each other. The 420HC blades seem to hold an edge nicely, and resharpen fairly easily, and resist rust very well. Also, the newer Buck 300 series have the edges of the bolsters more rounded off, so as to lessen the effects of pocket wear.
Jim