I bought an '01 S that came with a hardwired V1. If I were to purchase one, however.....it'd be a V1. I've personally seen the bogey counter save my buddy a ticket (the motorcycle officer was parked beneath a bridge that always gives a false positive, so when we saw the bogey counter hit 2, that was abnormal) and the arrows are another great feature.
Not quite a radar detector, but I use the app Waze. Here in VA, detectors are illegal. In about 8 months using Waze on the highway, I have not passed a cop w/ radar that I did not already know about.