Ahhh...another opportunity to pimp my G
zerothread?id=171813
There's lots of options. Most new amps have speaker-level inputs, so you can keep your stock deck. For my system, I used the rear seat "subs" for my amp input. The next step would be to replace the mids/highs, then the deck. You need to run a separate main power line from the battery.
Problem is that the deck will require you to buy a new console to accommodate aftermarket units. You also have to buy an AC control module. It's not crazy expensive ($400), but it is an added cost to the system.
http://www.grubbsperformance.c...eDash
Keep in mind this is for a coupe...