The best one I have seen is actually the one I use myself.
The Escort SR7.
Best radar detector on the market IMO. The only downside is the pricetag, but worth its weight in gold. I have one in every vehicle I own. I have picked up cops on I-64 2 miles away. Its concealed, and you just mount the sensor anywhere facing ahead of you. It has a couple options. You can use the LCD display or a bi-color LED. Heres some info:
The Passport SR7 plus also includes the the Escort's Laser Shifter ZR3. Simply install the "shifters" (2 front and 1 rear) and plug the modular connectors into the SR7's interface module to provide the only true way to defend against laser encounters. Then when a laser signal is received, the active Laser Shifters learn the pattern of the light pulse, and automatically return a light pulse, confusing the targeting laser gun.
Exclusive Auto Sensitivity Mode Reduces False Alarms
Passport SR7's exclusive Auto Sensitivity mode intelligently reduces false alarms created by security motion sensors and automatic door openers. Conventional Highway, and three levels of City Mode sensitivity are also provided.
New Advanced EZ-Programming
Instantly customize Passport SR7 for your unique driving preferences, including Power-On Indication, Power-On Sequence, Meter Type, AutoMute, Brightness Level (including full Dark Mode), Audio Tones, City Mode Sensitivity, Safety Warning System (SWS) Alerts, and Radar Bands (On/Off). Simply hold both buttons to enter Program mode, and quickly review or change your preferred settings. (Your settings are stored in memory, even when Passport SR7 is turned off or unplugged.)
Mute and AutoMute
Patented Mute and AutoMute eliminate annoyances from long radar encounters.
Brightness Control
Choose between 4 levels of brightness: Auto, Minimum, Medium, Maximum brightness, or fully dark for discreet night driving.
Ultra-Bright Matrix Display
Passport SR7's alphanumeric display uses 280 individual ultra-bright LEDs to provide crystal-clear signal strength indication, and text messages for programming and SWS radar signals.
Comes Fully Equipped
Passport SR7 comes complete with a comprehensive owner's manual, installation instructions, front mounted radar antenna, front mounted laser sensor, rear mounted laser sensor, in-car display controller, remote mute button, 12-volt interface with modular connections, complete wiring harnesses, and mounting hardware.
SR7 Options
For those who want or need a more hidden or fully integrated installation, a single bi-color LED may be installed in-dash, allowing the display controller to be "tucked" under the dash.
If more audio is required, an optional amplified speaker can be added, which plugs directly into the system's interface. This configuration is perfect for convertibles, trucks, etc.
Custom-installed discreet protection
· AutoSensitivity mode automatically reduces false alarms
· EZ-Programming allows instant customization
· 3 High-resolution meter modes
· Ultra-bright Matrix Display with 280 LEDs
· Multiple high-performance laser sensors
· Completely immune to the VG-2 "detector-detector"
New SuperCharged Radar and Laser Performance
Maximum warning for all radar and laser signals: conventional and instant-on X-band, K-band, and SuperWide Ka-band. Advanced Digital Signal Processing provides longer warning without increasing false alarms. Multiple low-noise laser sensors provide maximum range against targeting laser guns.