Hello my friends, I need help with new pair of wheels.

I have a road bike with Zonda wheels.
I'm willing to make a investment an buy new wheels.

At first I was looking at a Fulcrum Racing Zero, then some saw a good price on a Cosmic Pro Carbon - aluminum/carbon wheel.

My question is in between Zero vs Cosmic Pro Carbon which one would you guys choose, since I already own the Zonda ?

Is there so much of a upgrade from the Zonda to the Zeros ??

A friend told me the Cosmic i'm looking at are heavy for climbing and all around use.

thank you,