Everyone who is asking save your car and potentially your wallet a lot of trouble and stay away from best buy. Goto a reputable shop such as PPC. Hack box stores such as best buy hire sometime soley based on the mecp book test which means very little in the real world. Most specialty shops hire based on experience and or reputation which are both far far more important than being able to read a book and pass a test. I installed, sold, and ran high end shops for about 12 years and found that the guys that walked in bragging about their mecp certs could barely install at best. I only hired techs based on verifiable experience and even after many many years installing places like best buy wouldn't even consider hiring me since I don't do boom tests well. I'd feel safe saying there's not a best buy installer anywhere near here that knows half what I know, have done, or can do in my sleep. All in all goto a real shop and steer clear of the box stores. As for brands compustar or anything dei is the way to go.