I say skip the premium sound.. The price you pay aftermarket for much better stuff is much less. Also, why CD changer? Load everything into itunes and be done with CD's. Get the premium package. It's good for resale and it's well worth the price. It's going to be ~70K msrp car so why skimp on a couple grand. PDC and technology package is also a must IMO. It's cheap insurance against you pulling a bonehead backup and scratching or destroying a bumper or worst yet hitting somebody.