Mars Cigars is pretty awesome...they charge flat rate shipping...in case you don't feel like breaking that $100 threshold. They also sell discount damaged tins...can score some great deals sometimes.

Milian Tobacconists have fair prices, and I have heard their house blends are very good.

Boswells is another fan favorite...Northwoods is pretty yummy, and many praise their aromatics.

Just a few there I didn't see mentioned that are great etailers.