Call my car ghetto with 20's, oh well. I get compliments all the time. I love the way it looks with 20's....Like others have said, G's come stock with 19's so adding an inch is no big deal..My car rides better, looks better and handles better, sorry for that.

 

I have just installed the espelir gt's. Lowered .5 inch all around and ride quality is not much different than stock. I am a daily driver, and the car is very much drivable. Good luck.

 

I personally prefer 19s over 20s but whatever floats your boat. I would suggest going with a camber kit if lowering below ~0.7 inches. All the suggestions are good depending on how much money you'd like to spend.

The Tein CS full suspension is probably the closest you'll get to stock (391 lb/inch F & R). The stock spring rates are 314 lb/inch front and 342 lb/inch rear, as comparison ('04 / '05 coupe don't know if they changed for '06).

 

def go with the 20's........but the drop depends on your budget........the best and most expensive set up you can go with are tein and hks coilovers......if not then go with eibach or tein springs.......search it for more info