Good stereo setup for an A body?

I am looking to install a new stereo for my '72 Duster. I don't want anything "crazy", just a solid sounding system. Probably looking at 6x9s in the back with a single DIN head unit, and probably a power amp. Suggestions or other ideas would be greatly appreciated!
My 66 Valiant had the dash cut for a single DIN when I got it. There was a decent Sony unit in there at the time. It has the modern bells and whistles, and plenty of power at 45 watts to all four speakers. I put a pair of 4" in the dash and some 6x9's in the back. It makes more than enough volume and sounds very good. Going with most any name brand dash unit and speakers will work nicely in your car.