The education at all the locations is the same, so you'll have to pick the location based upon what you need.
If you are over 21 and like to have fun, then Las Vegas would be a good location.
If you want to go into computer animation for the movie industry, then Los Angeles would be the spot.
Cost of living in Vancouver is pretty good, but you'd have to check on out of state (country) tuition.
Denver would be good if you like outdoor activities.
Me personally, I would pick Portland or Chicago.
Here's a link to their locations.
http://www.artinstitutes.edu/locations.asp