My favorite wheelset in this area are Novatec D411SB-CL D412SB-CL hubs laced to DT R460DB rims.
The hubs come in 28 hole, and I personally like the cartridge bearings and centerlock rotor mount. I have 10k miles on these wheels and bearings are still as smooth as day 1, but if you absolutely must have cup and cone, substitute for Shimano R7000 hubs. The DT R460 rims are pinned/sleeved, but they have built up very true (I have 3 sets of wheels using this rim) and even on the rim brake version I feel no hop at the seam. Sapim Race spokes to finish off the set.