I rank them:
1. Pac 10
2. Big XII
3. Big East
4. ACC
5. SEC
The Pac 10 has 7 teams w/ a chance to make the Tourney, so does the BE but the difference is it's 7 of 10 for the Pac 10 and 7 of 16 for the BE. The bottom half of the BE is atrocious, the BE will always have more Tourney bound teams b/c they have so mnay more teams but that doesn't make it the best conf, not when there are so many easy wins inside that conference.