http://andarospizza.com/
One of our friends ordered from Andaro's pizza for a get together at their house (located in Cougar Ridge). It's an expensive pizza, but it is a lot heavier and more filling than your usual takeout/delivery place. Three slices would fill me up really good.
Lots of different types of specialty/gourmet pizzas. It looks like there is a pick up discount, and there may be a discount if you order a lot.
Definitely recommend this for a fancier pizza feast.