FWIW, I had a lowly 290s, bottom of the Signature series, and it was a great ride. Had it been 54cm rather than 52 it would still be hanging out in the barn.
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You know it's going to be a good day when the stem and seatpost come right out.
(looking for a picture and not seeing it? Thank the Photobucket fiasco.PM me and I'll link it up.)