I'm looking to get some new 6.5" component speakers for my Tahoe. I have a Kenwood Excelon Kac-X501F amp that is 75X4 @4 and 150 @2. I'm looking to spend about 150-180. I was looking at CDT Classics but don't know much about components. Also, should I look into getting coaxial's in the rear doors and run them off the head unit (alpine cda 7875)? Or would that not be necessary and take over the front stage somewhat? Thanks for any help