Bingo. The reason why Phoenix had given Dallas trouble the last couple of seasons was because their bigs were useless against them and they often had to go small to counter (I think? Correct me if I'm wrong, Mavs fans). Dallas sucks with small ball, at least against Phoenix and Golden State. They are at their best when they have two bigs in there, and this will allow them to do so.
The reason Dallas loses is because Erick Dampier is incapable of guarding Amare.

Would people go back and look at the results of the past few seasons? We win at least half of the times we play Phoenix. How does that equate to "we can't beat them"?