ZZF charges tax for orders to CA.www.zipzoomfly.com or Amazon? Amazon has been pretty competitive with Newegg on pricing. You will probably find that even with taxes, Newegg is going to be your best bet. They are very reliable at getting a package shipped quickly. That can't be said for the other etailers.
Tigerdirect? Free shippingon orders over $100, no tax, and they just had BCB at 15% though it seems to be down to 8%.