Dex,
For the cleanest and most stealth install, try
http://www.k40.com/K40Radar/CustomRemote.htm
They sell and install the K40 at NC Lexus dealers (including both Hendrick and Flow) as well as stereo stores like Freemans. I have one of the Sonaradar undetectable ones in mine (was already installed when I bought it), but I also have a Valentine One hardwired to the mirror power.
The V1 is by far the best detector I've ever had, including the K40 which is supposedly pretty good (I can run them concurrently).
I'd rather live with the ugly box and save all that insurance money.