Recommendations for a car stereo set-up?

I would buy a stereo that outputs 50 watts per channel 4 channels, a good quality brand like Pioneer (I am not familiar with good quality stereo brands), that has bluetooth sync to your ipod/pone. Put the stereo in the glove box and run the factory unit in the dash as a dummy. No amp, run four 3 way good quality speakers that are rated properly to operate on 50 watts each, rather than speakers that take 150+ watts to operate. Then you do not need an amp, your speakers provide full range sound all powered by your stereo.
I have not sourced 50 watt 3 way, quality speakers, (such as 6x9) so I am just guessing they exist.
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