Obviously, the Bears are better. They're allowing 7.2 points per game. But the Broncos have to be put up there as well, they've allowed just 7.4 points per game and only one touchdown all season, and that touchdown came with 5 mins to go in the 4th quarter after they were already up 17-0 on the Pats @ Gillette. San Diego is giving up fewer yards than any team in the NFL, but they're giving up points too (the 49ers scored 19 on them in the 1st half). I'd rank us ahead of SD, but I definitely give the edge to Chicago and Denver right now, especially after our secondary got lit up like a Christmas tree at home. We're probably the 3rd best defense in the business right about now.