Discount Tires direct (online only) is having $50 off set of 4 tires and combination with other manufacturer's rebate which can be quite a bit saving.

http://www.discounttiredirect.com/direct/home.do

For one quick comparison between this and tirerack.com, It will save me $60 for a set of 4 staggered 18" Hankook V12 tires (after shipping to CA and tax) for my 07 IS350.

I have not bought from discounttiredirect.com before so anyone can chime in if they have had bad experience with them.

I did not put this in tires/wheels section since not everyone checks that section but are in need or about to purchase a set of new tires. Mod, please feel free if you need to move this to different section.

 

Just brought from DTD, I'm from Canada so I saved about $100 compared to buying locally. They were great to deal with!