I agree SEC is the premier conference. And it’s not just a couple teams at the top and then a bunch of ho-hums, as we like to tell ourselves. That conference has actually displayed more parity than any other conference the past 25 years. Bama, Georgia, LSU, Auburn, Florida, and Tennessee have all won national championships since the advent of the BCS. As currently constructed, Big 12 has 2 teams that have won, ACC has 2, Big 10 has 1, PAC 12 has 1I don't mean this in a derogatory way towards the B1G, just as I believe people here also have an inflated view of the Big 12... but the SEC's top 3-4 each year are usually REALLY good, not just good like Michigan or tOSU the past few years.
Going forward, you're going to have a tier that includes Bama, Georgia, LSU, Texas, OU, and A&M as legit Top 10 programs. And you'll still have the occasional bursts from Tenn, Auburn, and Florida. Now, because some will play against each other, they'll obviously have losses and some move down in the polls, allowing for more opposing conference teams.
But if you had a playoff that included the Top 6 from every conference, I'm betting that the SEC would end up with 3 of the 4-6 teams standing at the end more often than any other conference having 2 standing.
This gets proven out every year in the playoffs. The only program that has really tested the SEC in the playoffs more than once is Clemson, and some would question if they're still at that ability right now. And the losses other conference winners take are usually pretty significant.
That said, I’ll believe A&M can be a legitimate national title contender when I see it. Other than athletic department budget, Tennessee, Florida, and Auburn are all better football programs and have all won national championships a hell of a lot more recently.