I like saltwaterfish.com, too. They have a minimum order amout of $79.00, which mounts up pretty fast, no problem at all!
Their prices seem good and I like the $18 for shipping.
And once you're a repeat customer, they offer you a freebie with each order, from a list which changes according to what they have. They offer a 15 day guarantee, and they give you a credit for the same item that died on your next order, as long as it's in stock. I do find that they are sometimes out of stock on lots of items, but patience is a virtue, right?