I had these speakers put in the front doors - Pioneer TS-A1686R A-Series 6.5" 350-Watt 4-Way Speakers and this subwoofer installed in-line to the rear speakers - Rockville USS8 8" 700w Slim Under-Seat Powered Car/Truck Subwoofer Sub+Amp Kit. I am very pleased with how it sounds. There has been one issue with the subwoofer where I have to pull the fuse about once a month but it's no big deal since the battery is easily accessible in the trunk. I don't know if the non-Sony radio has a subwoofer input, if it did that would be a better way to hook it up.
The speakers that came out of the door were pathetic and barely had a magnet on it at all.
I do have the 8" touch screen that does not have the HD Radio.