I am pretty new to car audio stuff. I know basic stuff, and I know how to wire stuff up, but I don't know what brands are good and what to look for in speakers, head units, and amps. I want to put new door speakers, subs, and a new head unit in a 2006 GTO, and my budget is around $800-$1,000 for everything. Is Skar Audio any good? My friend has two Skar IVX21s with a Skar 800w amp and they sound pretty good, but then again I haven't really been exposed to many "good" setups. Any help is appreciated