As all of you may know I have used the "top dogs" extensively and the two that I use now are the V1 and STI. I try to do my best to keep my opinions to myself since I am part of GOL and I do not want to come across as biassed but I am only human so I will give you my honest 100% HONEST opinion. Between the two our very own forum member Horn13 said it best and I agree with him 100% because this has been my experience as well. One's choice should be a no brainer if one lives in an area where Spectre III's are present. The STI is your only and EXCELLENT choice. Below is what Horn13 said in another forum when someone asked about people's thoughts on CP's recent test.
"I own both.
I'm hardly an expert but from my "Real World" experiences I also cannot see how the STI beat the V1 by such a HUGE margin........
I admit that my STI has excellent detection range on Ka band, but so does my V1.
The differences from my experiences are Negligible but I would say that the V1 is better in detecting all bands over my STI.
Of course in Laser detection there is no comparison. V1 is in a class by itself."