I bought mine from Esserman Volk, the one in the International Mall one though. They have been great as far as tech department goes.
I had my oil change last week and the manager even gave me two liters of Mobil 1 because he said since they burn oil pretty quick, to fill it up every 3k miles or so. They even installed Launch Control with no questions asked. One time also when I heard some noise coming from my suspension I took it in and they examined it, had the techs ride it to check it out and didn't charge me a penny.