Speed Measurement Laboratories Inc. rated the blinder m20x @ 97% effective after 120 passes. I dunno how independent SML actually is, it may just be a setup for marketing.

http://www.usblinder.com
full report: http://www.blinder.dk/sml.htm

Price: $300-$600

The consensus seems to be VEIL (Anti reflection coating) with blinder gives you almost complete protection.
http://www.laserveil.com/

Price: about $100-$150
this forum should give you hours of reading.
http://www.radardetector.net/

98 Contour GL 4 cyl 131,000 miles - 57,000 w/o a CEL! Get Firefox