If you go to many of the websites that test detectors usually the Escort Passport series and the Valentine V1 are ranked the top two. The V1 is great and has a cool feature of telling you the direction you are being hit from. The Passport's have very similar performance to the v1 except the directional alert option. However the 9500 series of Passports, like what Boramkiv said, has the ability to mark false alerts via GPS tracking. I've used many different detectors and I've had the most success with the Passport series. Lidar though is a whole different detection method that is hard to detect and react to. Laser shifting is really the only way to counter lidar but it is illegal in many states to interfere with police lidar.
2009 AW 535i
-Sport, Premium Package, and Comfort Access
-20" Forgestar F14 Black Gloss, Cobb PTF E30 map, KW V2 CO's, Remus Sport Exhaust, BMS DCI, RPI Scoop, Full Front 3M PPF, 35% tint all-around, Orion V4's, Bruce v6.1L cables, LED interior lights, WeissLicht License Plate LED, Trinity Smoked LED side markers, Bimmian Smoked Reflectors, OEM black gloss grills, and Invisibulb turn bulbs.