My brand new Roubaix that got wrecked by a car is going to be replaced by the insurance company and being that I really should be on at least 63cm/64cm frame due to my size I think I may be shooting for that. Problem is that 2011 the Roubaix is only going to make the 64cm frame in a $3k+ model which is more than I'm wanting spend on a bike. So for me it's coming down to these two which are similarly priced:

2011 Secteur Comp Compact - They have the 64cm frame for 2011, carbon fork, aluminum frame, and the updated 2011 Shimano 105 components

2010 CAAD9-4 - 63cm frame option, aluminum, carbon fork, SRAM Force/Rival components

I've already bought, ridden, and loved a Roubaix so if the Secteur is anything like that I'll love it. Never been on a Cannondale though. Looking for opinions, differences between the two spec sheets that are noteworthy, etc.

No opinions?

I would say if you loved the Roubaix to get the Secteur, especially as I believe the CAAD9 is race geometry vs comfort geometry on the Roubaix / Secteur.

Caad is "more approved", but the Secteur will be more like the Roubaix. That's stupid they don't make the right size anymore.

Size numbers are not of much value these days. What you really need to look at is the head tube length, with the headset, the TT length and the seat tube angle. The last two diemsnions work together to determine the frame reach.

If you'd posted you height and and actual saddle height it would be easier to comment on what size frame you might need.