I've got 10 cars and usually get all my tires from Tire Rack.They are fairly priced, often have deals and easy to deal with. I have them shipped to NTB Tires for mounting and balancing. They charge me only $14.50 per wheel for mounting/balancing.
Many tire stores will match Tire Rack's prices or come very close. Often when you factor shipping in, the tire store may be slightly cheaper.
The last tires I bought were for my Civic, got a good deal at Costco. My service rep at the local Honda dealer told me to go to Costco, best prices on Michelins. I am not a member there now, but might do it again just to save on the tires.