moving up 1 level of components wont buy you much as far as weight and performance. we all understand the itch to upgrade, I fight it everyday (somedays I lose). You would be better served buying a second bike, keeping your current bike, and alternating which one you ride just to mix it up alittle.
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2010 Kestrel RT900SL, 800k carbon, chorus/record, speedplay, zonda
2000 litespeed Unicoi Ti, XTR,XT, Campy crank, time atac, carbon forks