I hope you don't mean Fall 2009, if so you're in for a very long wait. The production coupe will be produced (hopefully) in Summer 2010. I was all set to order a coupe this Summer (2009) when the economic problems of GM pushed it back to Summer 2010. I went ahead and bought a loaded AWD DI CTS sedan for a great price and don't regret it. I'm still a coupe guy and if and when the coupe arrives I might go for it at that time.
pitty that the coupe will be a short and limited production run. I just hope the CTS will continue to be stunning into the next generation CTS so the coming coupe will make a base for the next, even more stunning coupe.