Cannondale Synapse & Bianchi Via Nirone

Hi
Am looking at these two as options for all year riding, training and commuting. Am lucky enough to own a carbon Madone as my 'best bike' I want something a little more forgiving and have a £1200 budget. For that I'm looking for the best possible combination of frame and components of course. I'm used to Shimano on previous bikes I've had.
Anyone got an opinion as to whether a carbon frame Synapse is worth stepping up to vs. the aluminium versions of these two bikes? The ride into work is back roads and suburbia - lots of crappy surfaces to deal with.
The alu Synapse is mostly Tiagra (or there is a 105 option) as is the Carbon Synapse. The Via Nirone is Tiagra or there is the Campy Xenon (but I'd dismissed that simply due to my Campy ignorance).
Any thoughts, observations and insights really welcome.
Thanks
Am looking at these two as options for all year riding, training and commuting. Am lucky enough to own a carbon Madone as my 'best bike' I want something a little more forgiving and have a £1200 budget. For that I'm looking for the best possible combination of frame and components of course. I'm used to Shimano on previous bikes I've had.
Anyone got an opinion as to whether a carbon frame Synapse is worth stepping up to vs. the aluminium versions of these two bikes? The ride into work is back roads and suburbia - lots of crappy surfaces to deal with.
The alu Synapse is mostly Tiagra (or there is a 105 option) as is the Carbon Synapse. The Via Nirone is Tiagra or there is the Campy Xenon (but I'd dismissed that simply due to my Campy ignorance).
Any thoughts, observations and insights really welcome.
Thanks
0
Posts
http://www.ebay.co.uk/itm/281064180880?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
If that was winnable for c£500 it would leave plenty scope for upgrading the wheels, shifters and rear mech to something better. FWIW I think they look great especially in the celeste and they are comfortable to ride. Overall spend could be well under £1000.
The cannondale gets good reviews but it doesn't do much for me in aesthetic terms. I think if it was a second carbon bike I would be looking at a Ribble and custom building the spec.
Cheers