This might be a little old but I don't seem to remember ANY audio upgrade options at least for the 2006 model. You get 6 speakers all the same with the same wattage no matter what model you get! That's one thing that t's me off. You get a cheap base v6 4x2 and it comes with the same speakers/power as the Limited Hemi comes with.
Silver 06 Commander Limited w/ HEMI and QDII, 245/70/17 Firestone Destination A/T, 2" Rough Country lift
09 Buell 1125CR
Past Cars Recent to Past: 06 Prius, 02 Camaro SS, 02 Jeep Grand Cherokee, 01 Plymouth Prowler, 02 Dodge Dakota, 98 Toyota MR2, 96 Cavalier
Past Bikes: 05 Harley Deluxe, 03 Harley Sportster, 06 Suzuki SV650, 04 Suzuki TL1000