Top 6? IMO, they are not that good as they are currently constructed.
Miami, Detroit, Cleveland, New Jersey are all undisputedly better. I think that Washington is probably better as well, and most would agree with that. So, that's 5 teams for sure. Chicago could certainly be better, as could the Bucks. Throw in the fact that the Pacers are injury prone (JO, Tinsley, Foster) and they could very well miss out on the playoffs.