The argument against a team not winning it's conference being in the title game is really dumb. The entire season is a larger sample than the conference season -- it gives you a better way to judge the quality of the teams.
No different that saying that a non-undefeated team in conference (Clemson, for example) shouldn't be allowed to play for the conference title -- "if we know that Clemson can't even beat NC State, then we know they can't be the best team in the ACC Atlantic." Obviously that makes no sense, but it's the same reasoning applied to conference champs and the BCS.