I stopped in the LBS today and priced out a custom set, which my usual guy would built in-house. DT Swiss rims and hubs, 14 gauge double butted spokes (28/28), totaling 1400-something in weight and just over $1000 with tax. (Is it crazy that my bike cost only twice that?)

That said, my mechanic still highly recommends the ksyrium elites at $650 (He also shared some unsavory tales about the guy who regards them as crap). They'd weigh a bit more (1550g), but I do think that rolling resistance and stiffness take priority. I suppose that I just need to decide whether the hand-built DT Swiss set is worth an extra $350.