This comes down to the same question as in NCAAF with the sec. Duke North Carolina and Syracuse(yes they were in big east but I can't it towards ACC) have won national titles over the last 11 years so as far as that goes they are probably the best. Then you can make a case for the SEC as they've won 3(UF twice and Kentucky). These are all just off the top of my head. I'm sure I'm missing plenty. But KU is the only national title winner in our conference in a LOOOONG time. But we've always had plenty of teams in the tourney, make the sweet 16, elite 8, and final 4. So it's all in how you look at it honestly. Just like football the big 12 has teams EVERY WEEK that can jump up and bite you and you can't ever take a day off and you VERY RARELY will win on the road by way of blowout. The big 12 TOP TO BOTTOM is the best. But talking bet teams then the big 12 is not......IMHO. But everyone has their different opinions of what qualifies conferences as the "best".