Arrrgggg.....I just lost a great post. Oh well, not you get the abbreviated version.
Up to a pound or more can be saved from each wheel with carefull component selection. A variety of front wheels I own, complete and ready to ride, range from 992g to 1454g. I know I can easily shave 40g from the lightest wheel and 200g from the heaviest for a very modest cost.
In reality the heaviset wheel I own, with its C-Record hub and Nisi rim, is probably the most expensive as well.