I had a 2001 Cobra with the Mach460... It was a total pain to get an install done. I personally thought the stock HU was decent enough especialy when keeping to a "non-modified" look. It took about a month to find the proper lead in the trunk to hook up an amp to drive the subs. It's been a while but I think it was a 3 or four wire lead with a grey wire that has enough voltage to drive a decent signal. We all thought it was the wire for the trunk light. Anyway, I thought the stock system was fairly well designed and provided enough treble and mid-bass to pass as satisfactory for my needs. Hope this helps.
P.S. I had mine installed at Best But as well. Maybe that's why it took almost a month to get it to work!
Jack
