The actual weight of the Aerohead seems to come in around 430g. The Kinlin XR-300 comes in around 460g and allows you to take 4 spokes off each wheel for the same relative strength, so consider those instead for a wheel that is more aero and about the same weight.

If you only ride on nice, smooth roads, 24/28 should be fine (20/24 if you take my rim suggestion). Otherwise, stick with 28/32 (24/28) to be safe.