Seriously, it's hard to argue with the Spurs representing the West, though they would need to repeat for the first time ever. The only team that matches up with them at all is the Mavs, but since the game seven win in 2006 they have had two notable collapses in the playoffs, so even that advantage is probably gone. It will come down to coaching and performance, which right now, is advantage, Spurs.
The Suns will be right up there as well, but it's hard to give them a chance when they have to go through San Antonio in the playoffs. They've also lost depth in the offseason with the strange salary-cap purging.
The Mavs I'm not as confident backing with the past few years playoff history and no significant additions that would light a spark under the team. But with the salary cap and only 2nd round draft picks to work with, what can you do? They'll be in the thick of things, and they still match up well with SA, but Dirk must return to the playoff player he was pre-2006 Finals. Not having to mess with the 72 win record would be nice, too. There's only one season record that matters, and that's winning 16 in April-May-June.
In the East, Miami has even less depth than last year, but they have just as much shot as anyone. I'm interested to see how the Bobcats do this season. But in the end it will be the Celtics, Bulls, Pistons, and Cavs (even without any offseason upgrades) battling it out for the Eastern title.