u drive a r34 GTR, a car that alot of people dream of. people please dont mention sony because thats the sort of deck you put in a 1991 toyota corolla. if you got $400 spend it on a Alpine or eclipse, i personally have a /////ALPINE CDA 9815 in my s13 lovely deck and has sooo much sound settings to customize to your type of music.

as with all things "cars" you get what you pay for
good luck and try and shop around go to at least 3 or 4 stores and never pay the marked price for car Audio no mater how cheap the price is!