My uncle Paul Martins has been doing competition & show quality sound systems since the 80's. He did a friend of mines NSX and my own. Paul owned Northeast Auto Sound a well known shop here in Philadelphia until his early retirement a 3-4 years ago. He still does installs by appointment only. There are not many people around with the experience and knowledge that he has. Many stereo shops are butchers. He has done many Porsche's, Lamborghini's, Lotus's, Ferrari's ect. He is very reasonable, does very professional work and does not cut corners.
If your interested PM me for his info.