I went with a 2.5 inch leveling kit from HBS. I'm very happy with it! My front sits about 1/2 inch lower than my back. Looks awesome!!! I've got 18 inch rims with 33 inch Toyo tires. Clearance is not a problem. I've heard 3 inch can cause problems later.

 

2006 with a 2.5" AutoSpring leveling kit cost $70 and i've got 275/70R18 tires about to go up to 295/70R18's