the colts have made defensive improvements...when did this happen? The colts keep losing defensive players, they don't have the D to go all the way. But look out for Bob Sanders, I went to school with this guy, he's a human missile. He's prolly only 5'7", but he has the biggest traps I've ever seen, is fast as hell and hits like few safeties in the NFL do these days.
The two most complete teams I can think of off the top of my head are Seattle and New England. New England gets Roosevelt Colvin back who is a big time sacker from the OLB position and added Corey Dillon, they could be scary.
The Seahawks added CB Bobby Taylor and DE Grant Wistrom. If their DT's can stop the run they'll be very tough.
I hate to do it, but I pick New England to repeat, Tom Brady looks like the gay guy from Six Feet Under...lol