I am thinking about possibly getting a Nakamichi CD-400 because i am unsure if when i put my subs in it would sound very good using the high level outputs. If you think i should get the HU, how are these speakers, i just want something a little better then stock and these are very low rms. They are the Memphis 15-prc63. Here are the specs amp.
The two stock 6X9's in the rear are hooked up to a little stock amp on the trunk in my 2003 monte carlo. I would use 2 shivas and an obcon ported box along with a 500 watt memphis amp.