My tier's:
Championship level (The only teams with a real shot):
Golden State
Cleveland
Borderline Championship level (These teams don't really have a shot to win it all, but will have a ton of regular season wins):
Toronto
San Antonio
Wrongly still think they are elite (Teams that can win 50 games but not contend for a title):
Los Angeles Clippers (Although I do think the Clippers probably fall back into the lower level)
The upper playoff teams (seeds 3-6. The good teams, but the not title teams. These are the 46-50 win teams):
Heat
Hawks
Celtics
Jazz
Memphis
Other potential playoff teams (Your 40-45 win teams):
Charlotte
Pacers
Blazers
Houston
Minnesota
New Orleans
Dallas
New York Knicks
Washington Wizards
The "can sneak into the borderline playoff teams with Westbrook"
Lakers - I don't see how he ends up anywhere else. Who would choose Boston over LA? That's crazy.
Then the rest are the crap.