I source my hubs in Taiwan...Ive been there for the trade show for the last 4 years and have spoken with all the manufacturers...

I buy the best hubs out of TW and have them fitted with Japanese ezo sealed catridge bearings...My hubs spin very nicely...very importantly !!

Taking things a step further...i buy hubs with the spoke holes accurately drilled-  so the spoke sits very snuggly in the spoke hole...this goes along way to reduce spoke fatigue. Its a small but very important step in building high performance, reliable wheels...

I do not just use generic hubs out of Taiwan...many hubs look similar..but its the little things that often count..right !?