I notice that you have both an 1800c and a Madone. I'd like to know the reasons you upgraded. I have a 1200c (1.5 years old) which is very much like the 1800c but this year I'm just not enjoying that bike. It seems bulky and slow to me. I'm riding my cheap ($199.00) Windsor chinese knockoff more. The only problem with that is it is a cheap aluminum frame that rattles your teeth out and 7-speed stem shifters.
So, what was your reasoning? I'm feeling kinda guilty wanting to replace the 1200c already.