I wont suggest car toys to you as i have had a bad experiance with them as well.
With the radar detector ,it's going to come down to how much you want to pay.MY suggestion would be the Beltronics RX75 plus . It has two laser jamming/radar detecting heads for the front (which you can mount in the grill), and one for the rear (which you can mount in the rear diffuser).The main unit is very small ,It has voice alerts that tell you the band that it's detecting and has different tones for each band as well.
it runs about $899 for the plus and $699 for the non-plus.(no laser jamming)
http://www.radarbusters.com/radar-de...ardetector.cfm
you may be able to find it cheaper somewhere else