Hiya--
I got the Cannnondale Synapse Feminine 4 - as a non-cyclist non-exerciser looking to get into it-- I bought 3 to 4 months ago and have put nearly a 1000 miles on it already - THAT is how great a bike it is to ride... mine is the aluminium alloy with some carbon bits and pieces like fork seatpost around it - 105 with ultegra shifters and it is a dream to ride-- speedy and responsive without being too twitchy-- I think it is a little under 20lbs fully loaded with drink bottles, saddle bag and gear in it etc. I am 110 lbs and easily carry it up flights of stairs one handed to my apartment so it cant be that heavy! If I was buying a bike tomorrow with no regard for cost (I wish!) I would stick with the Cannondale Synapse and just buy as high end of the same bike as possible, eg. allcarbon or something-- I love it.
batsheva