so a while back i replaced the stock front bianchi pisa wheel (bianchi hubs, alex solo, 28h) with a shimano 6600 road front wheel. total weight difference was 80 grams (including track nuts, road skewers).

anyway, i think you can build up some decently lightweight wheels using the novatech hubs, kinlin rims, and some nice spokes. i would not go less than 28h (3x) in the rear, though.