Defense.
Defense defense defense.
Smash mouth football the way it should be. Anyone see Jags-Steelers last year? That was a game. Play of the year 2004: Ray Lewis' "Welcome to the NFL, Carson" late hit. Simply beautiful.
And while historically offense may have done ok, look at the recent record. Last offense-lead team to win a Superbowl: Warner's '99 Rams. Last offense-lead team to go to a Superbowl: Warner's '01 Rams. Sure, you don't want to be like the Ravens last year, with precisely three offensive players, two of whom missed most of the season, but give me Ed Reed over Michael Vick any day.
The cap means overspending on any player is a bad move with regards to improving the team. Offensive superstars all require overpaying relative to their playing value, because of their financial value (bums on seats). Vick and Moss are the biggest examples of this, but there are plenty more. That said, despite my general preference for defense, I do love watching both those guys, Vick especially. That doesn't mean I want them on my team. My dream is that the Pats cut Bruschi because of the stroke, it turns out to be the wrong call, we pick him up and he turns out to have three more years of elite play in him. Won't happen - I'll be surprised if the guy ever plays another snap, which is a real shame - but it's nice to dream.