I've had great luck with these wheels this season:
http://www.chainreactioncycles.com/Models.aspx?ModelID=76173
the weight, durability and price all make them a big winner. In my opinion, that's where you'll actually notice the weight change.
I've seen them on morlands, and sparkplugs bikes as well as others. I can't justify dropping 400 dollars on a set yet. Maybe if I could get 250-300 for mine. I wonder if a local shop could come close to that price..