I will probably place my order for a V1 tomorrow (OUCH). Mainly because it sounds like it is the most user configurable as far as filtering goes, and you can minimize the filtering. I don't mind chatty, or at least visibly chatty. In my opinion once you learn the detector you can the best chance of determining if a reading is false, or if something has changed in the routine. If needed some filtering is available.
The "J" feature is the only thing that has me a little concerned. It sounds like once a J is displayed, the detector can be "silent" to real threat for a couple of seconds. I would rather have it disabled or display a J but switch back to regular mode shortly If the count changes or the signal stops and then reappears, I would rather know about it and decide what I want to do.