I would imagine their best lineup involves James and Battier at the F spots, with Bosh filling the massive void at C. Wade and Allen might be their best two guards, but Allen as third guard makes most sense behind the Chalmers/Wade starting unit.
Anyway, the issue of matchups is clearly at the F spots.
Interesting that Riley doesn't seemed concerned about Bynum by trying to matcup up with a beefy C. The reigns are in the hands of the Offense in Miami, and we don't have beef up front, either.
I pencil in KG and Bosh as a virtual toss-up these days. If Wilcox is backup C, we might have a slight edge for depth.
The guard rotations are Chalmers/Wade/Allen vs. Rondo/Lee/Terry+Bradley. Wade could go off, but I think we have enough bodies to keep him in check and enough talent to make him defend. I think our team will count on Rondo to make assists, and they don't have a foil for Rondo. Advantage to us at the guard positions.
So it comes down to how they use Lebron and how to match up with that. We have a nice stable of Forwards that could be mix-and-matched along the front line to try different things, and surely we'll try them all. Green on Lebron is the obvious one, so we could match up directly if he goes to PF by starting Green over Bass, leaving Pierce on Battier. We've got a puncher's chance there, but Lebron gives the advantage to them by himself.
So that's what I think they do, and how it matches up to what we have to counter with. We need strong guard play on offense and a solid defensive effort at each area: G's to stop Wade, F's to stop Elbron, and a C to stop Bosh, all together, to beat them.
We can do it, but it's going to be a grind.