I've replaced the POS 'premium' speakers with the Pioneers and applied Dynamat Xtreeme--that helped A LOT. I'm installing a Pioneer DEH-P3100 this evening--I'm looking forward to hearing how much difference that makes on top of the speaker upgrades.

1999 Contour SE Sport MTX75 T-Red/Grey
Audio: Pioneer DEH-7400MP (MP3 CD), Pioneer TS-A6857 front & rear, PPI PCX-250, Infinity Perfect 10.1
Other: cup holders, cargo net, Blizzaks, Potenza RE950s