I've been going to Tire Central in El Monte. They generally use the tire rack prices as their index (for the most part excluding specials and such). The tire rack prices is what they quote but included in that price is mount & balance and no additional shipping costs which you would incur with online vendors which is often an out-the-door savings of $100-150. On occassion they get bulk orders at a cheap price and so you might even get lucky. They also are proper with the installation and always use a proper torque wrench on my lugs.
If you don't mind driving to SGV you can tell them I sent you. I'm not trying to pimp them out.. just trying to give you an option.
Lots of other good choices all around SoCal but I built a relationship with them and prefer to give them my business.
I also buy my motorcycle tires from them and they mount and balance my track set. They do it so well that they take the time to remount the tire on the wheel to use the least amount of weights possible. 2 of 4 of my track set use no weights and are balanced perfectly.. just sayin :biggrin: