Yao's a tough matchup for anyone defensively. Again, you're passing off Dallas or its players as better than they really are. Diop better than Yao defensively? I'm not buying that. Diop is tough because he's got length and athleticism. Basically the same thing Gadzuric has. In fact, Gadz is a much better overall athlete, he just lacks some of the girth of Diop. Still, Amare dominated him.
Look. Dallas is very and could be there at the end of the season. Same as San Antonio. Same as Phoenix. , same as maybe even Utah or the like...
Roughly 65 games yet to play to decide which team improves enough to come out of the west. I believe Dallas is as good as it ever will be, despite youth like Harris and Howard. I believe Josh has hit his ceiling and that Harris is unlikely to hit his until Terry and Johnson are gone or played much, much less. If Johnson is played much less this year, then your team loses invaluable defense and savvy.
Meanwhile, Phoenix has a twice Conference Championship-calibur team that's just getting used to each other. Give 'em some time. For me, if they can improve just their rebounding, they'll compete night in, night out with the likes of Dallas and maybe even San Antonio.
I still think San Antonio is the team to beat, because they are already arguably the best team in the NBA and haven't even figured out their rotation and their big men's roles. Once they do, their defense should be stifling and their rebounding tops in the League.