I don't think that this is a three-horse race, at all. As I see it, there's one horse in the race, and that's the Lakers.
As I see it, home court advantage for the Finals is overrated due to the 2-3-2 format. What's important is Home Court advantage for the playoffs. Unless something drastic happens, it's looking pretty close to a no-brainer that that will be the Lakers in the West.
I think several teams have the ability to win the whole thing, no matter who they face: Boston, Cleveland, San An, Utah, Orlando, and Detroit. I'd even give Houston and Phoenix a long-shot chance. But if you have to pick a champ this year, you should pick the Lakers...not "The Lakers, or Boston, or Cleveland."