Congrats on the Nanners.
I buy from buymorecigars.com, they have some crazy low prices on boxes (Padron 2000s at $60), but they only sell boxes. If you want 5 packs jrcigars.com has a good selection, and they ship fast too. for singles try Dukecitycigars.com, have to warn you about them though I have gotten quite a few cigars in poor condition.
Other sites:
www.mrbundles.com
www.rockyscigars.com good place for Flor de Oliva bundles
www.cigarbid.com if you are into the auction thing, it seems that you can find better deals if you just shop around though
Also, if looking for a specific cigar just go to shopping.yahoo.com and enter the cigar name and you can find it really cheap, as it searchs hundreds of stores.
Happy smoking!