I for one am surprised to see a Kestral at $2200 (I don't follow the market like I used too), as I remember from 15 years ago when a DA equipped Kestral was $2000. So obviously it's not a hand made CF anymore, but another Chinese CF knockoff ?. Which begs the question, Is Kestral still going to be around if the frame has issues ?. They HAVE been thru some different owners over the years.

I also think that 4 lbs makes a big difference, though would not currently bother moving from a 22 lbs bike to 18. I'd spring for the bucks and go down to 16/16.5, maybe 17, but no heavier. Why ?, not good value. 8 years ago, an 18 lbs bike was light. Now 15-16 is the benchmark. Is something that light, too light ? - as in not as durable ?, can't say, maybe too light for me at +200, but fine for a lighter rider, especially as the weight savings from 17 to 15 is mostly in the wheels, with boutique wheels wanting to fail under heavy riders like me.

Maybe simply lightening up the Bianchi (wheels, crank/b-bracket, bar/stem) is in order - but that too depends on the age. If old 9 spd, maybe not.

My $.02

Steve B.