yes im adding a system to my bike ya gotta have tunes only soo much wind passing past ur head till you want to listen to music and the trick way im adding speakers to the bike is to put the 5.25 componets in chrome spot light housings and add the tweeters in motorcycle marker light housing there bullet design and under 15 bucks plus there chrome and look awesome then all ya do is tie it all into a mp3 player im using a I POD becuase they make a wireless remote for it that about the size of a car alarm remote and you change tracks and volumn.
That would be taking a few flights of steps down from a diamond. Those D3 amps are quite nice, another I would look into if you wanted to save a couple dollars is the Clarion APA2160 its 2x80 RMS. With boss and pyramid, you could buy imaginary power and higher THD or you could buy Diamond or Clarion or such and get CEA 2006 power and better THD. With those speakers I wouldn't just get a trashy ebay amp.