Here is some advice that I got on another forum. I had asked the question about Mavic Kysrium Elites supporting my weight. One person suggested upgrading to the SLs, but another, and sounder bit of advice was to opt for a 36 spoke rim in the rear, 32 front, Mavic MA3's, or something of equal width and spoke count, double butted spokes, eyelets, etc... hand built by someone who knows what they're doing...

This is equal in value to the advice to get the Mavic wheels from Nashbar, that have 48 spokes.

Sounds like very good advice. Now, all I have to do is find a good wheelwright.