If you can afford it, I say go with Insight wheels as they are going to be more aerodinamic, if you are really straped for cash you can even go with the crx HF steel wheels, they are slightly thiner steel, and only 4.5" wide, weighing just over 12 pounds (weighed my own hf wheel on an acurite scale, subtracted the weight of the tire), vx rims are around
9.5lb each and hx rims are around
11.75 pounds I really like light wheels, but spining spokes stir up the air, and that slows you down, this is why I laugh at kids who drop 100's of dollars on big spokes wheels.