If you want something between light and strong, somewhere in the middle, I'd look at building up some Kinlin xr-200 rims in 24hole front and 28hole rear. (big discount on random kinlin xr-270 rims in random colors).
For hubs look around at road hubs. Find something low profile, in the spoke count you decide to go with, and light weight. Pick any All city, Origin 8, Formula rear track hub in matching spoke count.
Match the rims and hubs to any appropriate length double butted spoke.
For cogs Dura Ace is good quality and cheap price.