Sports Illustrated’s 2013 College Football Preview is here -- and the two-time defending national champions are leading the way. No. 1 Alabama is one of six teams to grace a regional cover, joined by No. 2 Stanford, No. 3 Texas A&M, No. 4 Ohio State, No. 5 Oregon and No. 6 South Carolina.

But SI's preview offers far more than just a preseason pecking order: The issue features 28 pages of advanced scouting reports, Heisman Trophy dark-horse odds, a look at Stanford's Shayne Skov and other "revenge of the nerds" contenders, an examination of the influx of the hurry-up offense, a farewell letter to the BCS and much more.

Click here to buy a digital version of the issue.

No. 1 Alabama Crimson Tide

No. 2 Stanford Cardinal

No. 3 Texas A&M Aggies

No. 4 Ohio State Buckeyes

No. 5 Oregon Ducks

No. 6 South Carolina Gamecocks

Photo credits (top to bottom): Al Tielemans/Sports Illustrated; Cart Edmonson/USA Today Sports; Mario Cantu/Cal Sport Media; Jamie Sabau/Getty Images; Peter Read Miller for Sports Illustrated; Gerry Melendez/MCT/zumapress.com