Interesting thread, digressions and diatribes aside.
I agree with Koast, this is a fundamentally flawed question in that this team is the sum of its parts, specifically Shaq and Wade, and therefore you can't remove one piece and remain competitive as you go deeper into the playoffs, hence, choosing one over the other will net you exactly 0 rings.
The more debatable question is: Which one would you say is a must have and whom would you replace the other with and expect to win it all right now, this year?
Framed that way, for a one shot deal at a ring, the logical choice would be keep Shaq, pick up Lebron and get fitted for the Bling Bling right now. It is also the foolish choice because you would be a fool to let Wade get away, he is Lebron's equal, and Iverson's and McGrady's superior, McGrady's because he isn't a whine dog that I've seen a tendancy to choke in and Iverson's for more reasons than I can enumerate, not the least of which he is a team player and apparantly a pretty decent human being. Additionally, He is still very young and he shows a potential only Kobe has shown in recetn years, and he shows it without the selfishness of Kobe or Iverson, Lebron is the only one close to him and from the games I've seen, Wade is better at the fundamentals which makes him more valuable.
It would also be the foolish choice in that Shaq got himself in good shape this year, he slimmed down, he worked out he committed, for strictly egotistical reasons, to making the Lakers look foolish and to winning a ring in Miami, and he still didn't make it through the entire season, and no, I don't think the Jermaine O'Neal bump was all that bad, this cat just has a lot of mileage, and to think he will last and be effective more than another 2-3 years is to be optimistic indeed, and to give up Wade for that is ridiculous.
And no, Joe, dynasties do not happen because all of a sudden a team is committed to winning, they happen because the Jerry West's and of the world have a game plan, and they slowly assemble the pieces needed to win and replace those pieces as needed, the Lakers happened because of the build it with right pieces mentality, it certainly didn't happen overnight, the Spurs little mini-dynasty happened because they realized they needed to assemble a team that could beat the Jazz, who had assembled a team to beat Houston and LA, etc.