GO valentine.... bel.. or escort....
I have an Escort 7500 and it works great!
But any radar detetctor you buy can and will detect KA bands... K bands.. and X bands... as well as LASER. Then theres other features for usless stuff like Emergency Vehicles.. etc
but there are only 4 things cops use.. radar and laser...
but anywho....
even though this is illegal.. go out and get an Radar JAMMER

You can have one that is basically a faceplate over the license plate.. (the border) and is undectectable.. and jammes radar and laser.
But if you really want and rader "detector".. try this out.. undectable and un-noticable
http://www.escortradar.com/sr7.htm
BUT.... if you want more info on virtually EVERY radar detector and everything about them and how they work... go here
http://www.radartest.com/