Would these be a significant upgrade?
http://www.neuvationcycling.com/product311.html
http://www.neuvationcycling.com/product310.html
I haven't weighed my current wheels (I should remember to do so next time I change my tires), so I've no idea how much if any weight advantage I can gain without going to carbon.
Or would I be better off going with the aero versions:
http://www.neuvationcycling.com/product308.html
http://www.neuvationcycling.com/product309.html
I like climbing, but I think my hard-effort performance in fast group rides and races may be more limited by aerodynamics than weight.