Looks like the 2012 Cannondale is Apex which IMHO isn't worth crap. I had Apex on my 2010 Specialized Tarmac. The Apex is one thing I DID NOT like about the bike.
Get the Z85. I replaced the Specialized with a 2011 Felt Z4 (see below). Love it.

And 105 is much better than Apex.
Now excuse me while I go fix some

for the upcoming entertainment.