There are so many variables that can influence what the best decision for you will be. Are you married? Do you have kids or are you going to want to have kids soon? If you don't have kids but are going to haven them sometime in the near future, are you going to quit working to stay home with them or will you continue with your career?

I would say that if you plan on staying single and supporting yourself for the next, say, 5 years, it may be in your best interest to continue pursuing your career so that you can support yourself. If you're getting married or are already married and your fiance/husband earns enough to be the main breadwinner, then perhaps the job that isn't in your career path would be okay for you.

If you're going to have kids soon (I'm assuming from your post that you don't have any) and will be quitting to stay home with them, then either job may be right. Do you want to spread your wings career-wise and accomplish all you can before you're tied down to a family, or do you want to be able to go do fun, recreational activities before you're tied down to a family?

The other question is: will you be fulfilled if your job isn't that challenging in the contect of your education? Will you feel that you've wasted your time at university and will you be challenged enough if you don't take a job in your field of expertise?

So, like Denise, I have no real answer... just some things to think about. Good luck!