Well i for one am extremely happy with my caad8 for this year. Especially for the price i got it for. If i was going to give into cannondale's promotions, i'd probably keep my PT wheels, and sell my caad8 and synapse for a system six some time during the winter.... or maybe sell everything and see if i could afford one of the SRM equiped system six's. I guess i just wouldn't want to be shopping for a new bike right now. I haven't seen a system six here yet, and i doubt i'll see a caad9 for at least a couple month's. Both are brand new so they're not exactly going to be onsale the first week they hit the floor's.
Maybe see if you can score a beater for a couple hundred to get you to and thru the winter then get yourself a christmas present once everything is out and prices might be a bit better.