Best 6x9 Speakers

Actually I am using pioneer  ts-e6902i car speakers in self made small towers ,love the beat, dynamics and midrange at work place:)

see if you can find some old boston acoustics speakers.  amazing!
i have heard some good polk audio too.  
of the current offerings infinity kappa or models made by hertz (see woofers etc online) are very good, as are jbl gto.  
stay away from alpine and jl audio.
focal are good but way too bright and require lots of eq.  

Rockford R169X2 6 x 9.  Cheap in price yet Rockford is producing a decent sound system competing with other brands.

I guess these 6x8 Speakers are good for your car if you are crazy for bass.

I have the JBL upscale stereo in my 2008 Tundra and the Mark Levinson stereo in my 2002 Lexus.  I use both for listening to books on CD or news stations on the radio.  Serious music listening is done at home on my 2 ch. system.