Holt's, Famous, CI/Cigarbid have been good to me.
Sticking to the same retailer for everything can cost you a lot of money.
A great list and ranking of online retailers here:
http://www.cigarcyclopedia.com/webap...inal_90709.pdf
Current price lists for 10 of the top retailers:
http://www.cigarcyclopedia.com/webap...pper-92509.pdf
Those PDFs are dated, so go to
http://www.cigarcyclopedia.com/ and click the link for "Comparison Shopper" in the future..