Viper5, I don't think you actually know how it works.(no offense) Here are a couple of links to help clarify some of the stuff for you.
http://www.popularmechanics.com/blogs/automotive_news/4279971.html
https://www.escortradar.com/store/passport-9500ix.html
Maybe some of you misunderstood the "gps" part of it. It doesn't give you directions, it just tells detector the global position of itself in geographical relation/speed, to the radar signal being emitted. It stores them so the next time you drive by that spot it will not beep. The GPS will alert you to all the speed/redlight cameras and is updateable from your computer/laptop. As for blocking out that particular signal, each band (k,ka,x) have a wide variety of sub bands within them. it blocks those subbands and not the whole band.
Again, both units are top notch and you couldn't go wrong with each. Do your homework and try not to listen to the coolaid drinkers. I own the passport and love it. I love the fact that it only beeps when there is a cop. To me that is the deciding factor. Yes I would love the directional arrows,but not at the cost of locking out false alarms, and if anybody has owned one they will agree.
Excerpt from Popular Mechanics:
Bottom Line: Within a week, the Escort 9500ix was 50 percent less irritating than when it started, which made it 90 percent less irritating than any other detector on the market. It's a weird metric to use for a piece of electronics, but a radar detector is only valuable if it gets your attention at the right moment. The problem with most detectors is the desensitization that occurs when you are alerted over and over again at all the wrong moments, and that makes the learning feature of the Escort 9500ix a truly elegant idea.
http://www.popularmechanics.com/blogs/automotive_news/4279971.html