It's a fantastic car, and if I was getting a classy sports sedan it'd be at the top of my list. Plus judging by your avatar it seems like your a modern Cadillac fan, so my only piece of advice is...
...get it in the right color. It looks like ass in beige or "Gold Mist", and while some cars pull off silver beautifully, they're rare because it's such a cliched color. The CTS is one of them, but only darker silvers. Black may be menacing but it's even more overplayed and doesn't look good on it. The funky pearl color looks like a Hot Wheels car that got left behind in a Home Depot paint mixing station, so even though shiny paint is cool in this case it sucks. The generic red they've been shoving down our throats fortunately matches it. And blue...what are you driving, a rental car?
Just my two cents.