Tara is is looking for a good alternative to Adobe Illustrator

I'm a huge fan of Adobe Illustrator, but not a fan of the price. I don't use it enough to justify paying the $650. I don't have a recent enough version to upgrade. I'm on Mac OS 10.7.2 (lion). What is a decent vector drawing program that I can output eps/pdf files as well as the various other image files that I could buy? Bonus for software that is downloadable online (instead of ordering boxes).

I can spend up to 200 USD
from Montreal, QC

Asked Dec. 2, 2011