What's better having an aneurysm clipped or coiled, and what are some of the risks?

Depends. On where it is, how big it is, and whether you have symptoms, family history, etc. See your neurosurgeon before you make any decisions. He/she can tell you about the risks also. And this is a good time to say: smoking is out of the question! if you're smoking, quit. Period. No excuses.