You know I think I heard something about not being able to find a lot of cigars in the Dominican... My memory is really hazy about that since I read it a while back. The funny thing is that it might be easier to buy Dominican cigars in the US! Hopefully someone else will be able to help you out with specifics and clarify anything if I've got it wrong.
I think the La Aurora/Leon Jimenez factory does tours. Cigars might be available there for purchase.
As for what's available from Dom:
Torano has a factory there
Altadis used to make Henry Clay H2000 there, don't know what'll happen to the Broadleaf HC's...
There's the Fuentes
Avos, Davidoffs, Alec Bradley's multitude of brands [Occidental, Occidental HSG, Criollo 98, Trilogy, Trilogy ovation, "special blend"]
La Gloria Cubanas -- most folks will say the Wavels or the Coronas Gorda, especially in maduro, are good.
El Rico Habano
La Auroa
Leon Jimenez
Oh, there's undoubtedly more. I just don't know what else.
Of these i would go for the Torano stuff (signature line), Henry Clay broad leaf, and the La Glorias first. Most of the rest I don't have that much experience with so others can definitely fill you in.
Good luck!
E
BTW-- isn't there a nasty Canadian customs duty on tobacco in value of over $15?