There are several companies that make the 1. 5 DIN size: Alpine, JVC, Audiovox, Pioneer. I have the Pioneer DEH-P47 and the Alpine (forget the model) there were only 2 alpines offred in this size, i went with the higher model.
Of the two, I definitely prefer the Alpine. Much better ergonomics, looks, and features. In fact, I absolutey detest the Pioneer; you can't pause CD's easily without the remote, the diplay bleeds light all over the LCD, the volume adjustment is way too slow, the display is clunky.
I can completely turn off the Alpine's display, pause CD's, change the graphics, etc . .
Sound ... better on the Alpine. Offers 4v outs, more power due to the deactivated display, less imaging controls, but cleaner sound IMO. But ... sound difference is almost neglible with factory speakers.