I use the Pioneer 7490 all in one unit in my comp. car. The unit is easy to use. Avoid touch screens for oil buildup on the screen tends to cause problems. The pioneer unit can be purchased from e-bay at $1,100 with the XM and Nav. as options. As far as sounds quality its hard to beat any of the in dash units beacuse of the 24/96 digital converters. But if price is an issue go with the pioneer.