if you are sub 90kg the light bicycle AR25s are going to be the lightest. there are also some Fiber In rims that are sub 300g with no weight limit. as for hubs, extralite, Tune DT Swiss 180 are probably the lightest. however, novatec 411/412 are super light and affordable, venfort makes a super light DT 180/240 clones that are way cheaper than the other.
For spokes, pilar 1420 DT swiss aerolight are the lightest. if you have the $$ then Berd or Pi Rope will save you another 100g over the Pilar/DT Swiss options.
I hvae the novatec/fiber in combo and they are sub 1100g.