Rim choice for fixed wheel TT bike.

It was suggested that Open Pros with fewer spokes may be the way to go, and the article indicated that fewer spokes on a box section rim does not help at all. Aero rims are definitely the way to go for TT speeds, regardless of the weight difference. Maybe this article would answer things a bit more definitively.

http://www.cervelo.com/content.aspx?m=Engineering&i=Aerodynamics

Open Pros aren't box rims though :S