[68c10airstream]

I've upgraded stock entry level late model stereo systems with 6x9 3 way sony's a couple of times and was impressed with the change. $100.00 for a pair was money well spent.

I currently use polk 6" in kick panel i made using tin buckets and a mdf board. Get a bucket with the bottom a little wider than the speaker hole needed. Cut out the bottom, cut slits up the sides all the way around, cant the bucket up at an angle pointing to you when finished. Bend the slit legs at 90 degrees and screw to mdf board. Buy a gallon of evercoat body filler (bondo) and smear around the outside of the bucket to make a teardrop. Sand and paint as you wish. Pack a little fiberfill inside the bucket before you install the speaker. The mass of the mdf and bondo and bucket gives the bass a good sound structure to work off of.

A nice stereo with cheap speakers is worse than low cost stereo with great speakers.