I like Wilbon. 
So do I. I always used to watch him, Kornheiser, and Riggins on the Redskins Report, and PTI is the only talking-heads sports show I can regularly watch.
Willco's right that Wilbon can do some good columns when he really cares about something. I think his commentary on racial issues is pretty good too, as opposed to someone like Scoop Jackson.
Mike Wise is stupid and boring and I hate him. I can understand the WashPost hiring from out of the area for the A or business sections, but sports? If you're going to do that, the guy better be exceptional. Mike Wise is a five-tool mediocrity: he's not good at humor, insider scoops, in-depth analysis, prose style, or local color.
I realize that Kornheiser and Wilbon are both transplants, but Wilbon was a beat reporter for a decade, and Kornheiser did as much to immerse himself in the local sports culture as anyone. When I was a kid, Bandwagon, Choking Dogs, and The Curse Of Les Boulez were in everyone's lexicon.
Oh, and Bill Simmons has outstayed his welcome. He may have been a breath of fresh air, once, but if I got started on him now, it'd be hard to stop ranting. So I'll leave it at this, for now:
He constantly makes references to 90's Fox series (Beverly Hills 90210, Melrose Place), and has yet to drop a single Simpsons reference.