Of the cappers I make a point of reading, GoSooners has about the most well-thought-out and well-stated opinions. It'd be tough to find a better Big 12 guy. I also pay a lot of attention to what Prodigy has to say, especially for those pissant MAC teams. He can come across as a little gruff, but he's very bright.
There are also some sharp Pac-10 cappers on board. I tend not to follow those threads as closely as others, though, because unfortunately whormoan will eventually drop in to turn it into a "Pac-10 sucks/No it doesn't" grade school argument.
But I think the best advice is probably to take into account these other opinions and insight then make up your own mind. Following someone else blindly seems to be a lot more stressful and a lot less fun.