Mike Rosen's loss — big loss, since much of his nest egg was invested with Bernie Madoff — is Denver's gain. Rather than retire, Rosen's still on the air, and his experience shows: He's extremely fluid in his delivery, well-reasoned and well-read, incredibly versatile in subject matter. Rosen doesn't just bang an anti-Obama drum, although he does talk about politics (and features Governor John Hickenlooper once a month); he also devotes time to baseball, entertainment and, yes, grammar. Rosen is a talk-show pro who's only gotten better (read: more patient) with age — which may not translate to high ratings in this rant-rewarding climate, but pays off for listeners who actually want to hear intelligent discussion.