San Antonio is the one team in the association that has been able to draft their way into a dynasty. For everyone else, acquiring big names through trades or f.a. is the way to a championship. Most big name guys will only go to a) a city with a history of championships (Boston, Chicago, Los Angeles) or b) somewhere they like to live (Miami, Orlando, Dallas, LA).
Even with the salary cap in place, certain franchises still hold inherent edges over others. IMO good front offices can turn any team into a contender -- take Utah for instance. What young, rich black athlete in their right mind would want to live in Salt Lake? The fact that they've been in the top 3rd of teams in the Association for the better part of two decades shows they have arguably the best front office around. I personally see it as being much harder to build a contender in Utah or Milwaukee than it is to build a champion in Miami or Los Angeles.
Same goes for Cleveland. Unfortunately Dan Gilbert and the rest of their front office has shown little to no ability to perform their jobs up to par. Cleveland is screwed for a long, long time.
PS Re: Conference power, I agree the East is getting better, but for the foreseeable future, the west still provides a much tougher road. I suspect that in the next couple years, we'll see two, maybe three teams make playoffs in the east that wouldn't even have a prayer of sniffing the playoffs in the west.