There isn't a lot of space to be cut out in my Nano to install decent speakers. And the engine hum intrusion is quite high. I did consider these - Pioneer surface mount speakers. However at over 8k shipped, they are quite expensive. And I was hoping to install 4 such speakers, 2 smaller ones in the front, and 2 bigger ones in the back. Options - a) To get cheap 5.1 speakers, and install the satellites in 4 corners. Issues - No bass, and the speakers won't last in the heat and dust of a car interior. b) To invest in an alternate/cheaper set of surface mount speakers. Mount them vertically on either side of the C pillar, firing forward. c) No idea. Help! What do u suggest??