I think so.
I'll depend on two things:
1) The health of the starters.
2) The surrounding cast.
I personally think that 1 is more important than 2. I think they need descent players, but I think they could get by with West, BBD, and then just mediocre bench players (like no Battier, Jefferson, Hill, etc.). And I'm talking about guys like Reggie Evans, Mike Dunleavy Jr., Troy Murphy, etc. But the real key is that the starting 5 is healthy. I feel confident that they can be the best starting 5 in basketball, and that can win games in 4th quarters.