aicabsolut
i'm moved that I was on yr ride with you for a while!!
DH measure my shoulders to be about 34 from clavicle bump to clavicle bump...my 38s LOOK pretty much like a straight fit from my shoulders.
I'm not sure that the 40s though would be uncomfortable...I was imagining making the width a cm wider on each end and it seemed like it would be nice in come ways...
On my last 20 mile ride I discovered that I was alot more comfortable riding the hoods than the tops of the bars...and going downhill I went into the drops which seemed fine except for reaching the brakes part.
I also just got in the mail the shims for my brakes...so now I imagine it's a matter of fit more than ability to brake and shift---given the size range I'm looking at.
I'm going to go look at the Cinelliis today....and the easton in 40 is on ebay ending tomorrow....the NIttos are at SomaFab.
Discipline is remembering what you want.