Its always hard to rank the top but I would put Lebron, Kobe, Wade, Durant, Deron Williams for my top 5 with Roy and Paul not far behind (couldn't put Paul in there with him not having played for so long)
Certainly a respectable list. I might argue that Durant > Wade. However, that's irrelevant to the point that I think most people agree that Kobe and Lebron or Lebron then Kobe are in a class by themselves. The rest of the top players are merely trying to fill that void from 3 on down.
It doesn't address where Dirk ranks. Quite frankly, I like Dirk but I can't see him cracking a top 5 list unless he's got someone else on his squad with that "killer instinct" Sadly, Dirk is doomed to continue to fail because he's just not a closer. Lots of sexy stats and lots of W's in the regular season but he just won't bring it home.