The bride got me Season 3 of Have Gun--Will Travel for Christmas, and I am LOVING it! Plus, our cable provider carries the Encore Western channel, which has also begun to show episodes.
Dartmouth for one example.
Anyway, back to the concept of the antihero: think Rambo and you pretty much have it.
Wikipedia tells us that an antihero is "...generally considered to be a protagonist whose character is at least in some regards conspicuously contrary to that of the archetypal hero, and is in some instances its antithesis."
(Photos taken by me from my TV)