pftaylor, where are you located and i might be able to figure out how you can get some good fresh mozzarella, or some fresh mozzarella di bufala.... I was given some samples of the polly-o about a year ago or maybe even longer, and I was very unhappy... the salt level was right i think, but the texture, freshness, and meltability were all bad.. I know that grande cheese has a loaf in the works, but first they are going to release a fresh ricotta... soon i think. Some cheese that I have had luck with over the past few years has been lioni, alleva & dipalo in little italy nyc, aiello bros on 18th ave. in brooklyn, joes dairy... there are some famous places in hoboken as well although i have not had them. some of these places do mail order... I think for the quality of pizza you are making, or striving for, the mass market cheeses no longer serve you... now you need and artisan cheese for your artisan pizza! Let me try to come up with some ideas and good sources for you... as far as mozzarella di bufala goes.. Most of the mozzarella comes into the u.s. once a week, then sits around grocery stores, or distributers until it completely decomposes or someone eats it, the trick is to get right off the plane...., so you will then have the freshest buffalo mozzarella possible in the u.s., then to immediately drain the water and let it sit before use. once this is done, you will have 5-7 days of good perfomance. There are several mailorder outlets that ship it direct from italy, that might be a way to go, as long as the put some kind of date on it so you know. I know pizza makers that also use the grande fior di latte which come packed in water, but to promote long shelf life, it is not salted enough and makes a bland pizza, and to compensate for that lack of salt throws the balance off of the entire pizza off...