I've had really good luck with Diamond Back, mostly using premium high performance tires. I've also had a couple sets of Coker's I've been happy with. Never had a balance or out of round problem. Some of it comes down to the style of tire you're looking for. Bias look radials, regular radial, bias ply, etc. Was it the 62 bird that had the thin red and thin white stripe as an option?
Spokers have to be sealed around the spoke nipples to run tubeless. I had True Spokes that were sealed but they still leaked. I don't know about the Kelsey Hays types but they will have to have tubes if they aren't sealed. Coker sells what they market as a radial tire tube and I've not heard much about how well they work. Tubes can be run in any bias ply tire but were generally not recommended for radial ply tires till Coker started marketing these.
I got these Hankook Optimo whitewalls at wallyworld (walmart). $53 each + mounting and balance. MUCH less expensive than the wide whites, so I don't mind as much that they'll age-out before they wear out.Not sure, he wants a thin white.