Marty,
I, too, have been running spoke wheels because I always loved the look of spoke wheels. My front one is a high shouldered Cosmo 1.85 x 17" (like Borrani) and the rear is a used junkyard 2.5 x 17" DID. I laced both of them myself, but find that at least with the old rims, I cannot get the rims to run any closer than about .050" out of round at the weld (where the factory welded the joint in the rims). You would think the tire would even that out, but apparently not, as I have checked the wheels with the tires on and they still run .050" out of round. Last year I cracked my frame in several places starting near the rear wheel (rigid frame with a single cylinder BSA which vibrates like hell). So I have decided to try cast aluminum ones which I have found to have less than .010" of run-out. I really can't explain why my frame broke, but I just don't want to take a chance again. Maybe new Excel or Sun rims are better, but not the new Akront/Morad ones, as I have laced up a few of them as well.
Another reason I am changing is the difficulty I've had mounting ZR rated tires on my old narrow spoke rims. I have pinched a fair share of tubes getting these new tires (Avon AM26's are just as hard) mounted on the rims. What if the tubes I'm running now are only pinched half way through? Cast aluminum rims, no tubes. Those are my thoughts. I will be posting info on my new rims shortly.
Tom