I highly suggest bringing your own sticks. You're going to be paying atleast 3x what you would normally pay in the states. The only plus is that you can buy habanos, but they are also rediculously taxed. I've only been to Thomas Hinds and Frank Correnti. TH has a pretty large selection but prices are typical canadian prices (way too high). Frank Correnti sells frank correnti cigars. They roll them there, and are 100% cuban tobacco, long filler and the tobacco has been aged for a min. 5 years. I've only smoked 2 of them so far and they were pretty good.
Here's the website
http://www.correnticigars.com/.