Your best bet is to go to a supplier site like LMR or CJP and see what's available for your car. Make a list of the brands. Go to Youtube and search for sound videos with those systems to see what you like. Youtube is good but doesn't always capture the true volume or tone, so I also suggest going to the track, car shows, and cruise-ins. Mustang-focused events would probably be the best. If you hear something you like, ask the owner. Guys at these types of events love to talk about their car and combo. Good luck!