I'm a lightweight in comparison, but given you are getting these wheels built, consider some newer rims. My take is that modern rims are a lot stronger than 80s stuff.
someone like cycco or others with wheel building experience and heavier than me can chime in with authority.
I suspect that you could find good prices on 36h modern rims that in the long run, would be worth spending the money on now.
wheel builder competency and expertise is always going to be a big factor here also.
That's probably true. I've looked at Rhyno Lite's and Velocity NoBS, but I think they're ugly. I have not come around (aesthetically) to any modern rims I've seen yet. For one thing I like a 32 mm wide rim and a shiny high polish. Like most I want function and beauty. If I get quick rim failure, I'll look at others, so I'm open to suggestions.