I am a slow-ish, newbie racer and recently upgraded from a 20-21 lb steel Bianchi to a sub 16 lb carbon fiber Look 585 for road racing and the difference is astounding. The stiffness of the Look frame gives me noticeably more "snap" for quick accelerations and the lightness is very noticeable on climbs. I can't imagine racing the Bianchi now after racing on the CF Look frame.
My question is this: I had planned to race cross this upcoming season on a steel Gunnar Crosshairs that I have (currently used as a back up roadie and a commuting bike).
I like the Gunnar a lot (the fork is buttery smooth and glides over bumps with ease), but it feels like a heavy pig to me now. Since I am an old guy with some disposable income, I am contemplating getting a Ridley X-Night or some other lighter cross frame. The Gunnar maybe comes in at around 20 lbs.
So how much does weight matter in cross? Should I stick with the Gunnar or go for something lighter?