Liftman,
If you're looking at paying for a rating out of your own pocket, and have no firm job offer to go with either rating then I'd have to agree with x933.
I have a number of friends qualified on both XLS and CJ series aircraft and all with plenty of jet hours (some with command time) and they are having trouble finding work.
No offence, but with a brand new type rating, and no hours on type........well suffice to say the odds are not likely to be in your favour.
If money is not an issue to you, then I'd go with the CJ series as the new CJ4 outperforms the XLS and seems more fun (personal opinion before everyone shouts at me).
Best of luck all the same.
Chinchilla.