well in my opinion if you get a good coaxial and feed it decent power it will sound just as good as entry level seperates assuming their installed so that they will give a decent sound stage. if the speakers are low in the door pointed in towards each other your soundstage will be about where you right knee is. basically seperates let you mount the tweeter in a location that will optimitze stereo imaging, bc high frequency notes dont penetrate your cars interior like subs do. personally i have polk ex 6.5 coax in the door w/ about 75 watts powering them. these sound really good to me, but because they are in the door the sound stage is lower than i want. so i installed a pair of coustic tweeters in the triangular defrost pod by the side mirrors in a swiveling cup so i can focus them at my head. these are getting about 15 watts from my deck. this makes all the diference as far as imaging and sound stage goes, the music sound like its coming off the front of my hood directly in front of me. i have the fader set slightly to the left. this setup cost about 150 for the tweets and the polks.
