There is no question that this equation is correct. But, what is the ceiling of a team like that? I envision Phoenix. Star PG + Star PF that doesn't play defense = consistent-playoff-team-that-never-seriously-contends-for-the-title. They have some pretty decent pieces around Nash and Amare, yet they still can't contend because they have no interior defense. For just reaching the playoffs, we don't really need Bosh. I think we have a pretty good shot at it next year even with the current roster + rookie big + a decent FA signing in the off-season.
Brick mentioned several times the formula of star small + star big = title. He forgot to mention, though, that all these star bigs on championship teams were HUGE defensive threats (Kareem, Olajuwon, Shaq, Duncan, etc.). I really can't see guys like Bosh, Amare, or Al Jefferson ever winning a ring as one half of a star duo. They will put up big numbers and get a lot of media attention, but no title. The only way it would work is if Tyreke becomes as dominant as Lebron and just dominates the league regardless of who is around him, but as much as I like Tyreke, I highly doubt he will become the next LeBron. And even LeBron hasn't won a ring YET.