Hearse is very cool. That would be a fun project. You have been PM'd...

These projects range from ghetto-style $600 cheap put-together stuff to all-out purpose built systems in the thousands. You can decide.

Also, I see your Lotus Elise is equipped with JL Audio speakers. Does it have their Stealthbox? If not, you have to check it out. This is one really classy piece for the Elise. A little pricey but a ton of sound in a small package, just like these cars!