Steve's Warehouse Tires is great! They have all the major brands of tires at good prices, and they are SOOOOO friendly and helpful! We love dealing with them!
One of the neat things about them is that after you buyt from them, if you ever have a puncture or need balancing or other maintenance on your tires, they'll do that for you for FREE! They take care of their customers. They even fixed a wheelbarrow tire for us!
I can't say enough good things about them!