Obviously the majority of yall out there says the V1, but i have had a k40 electronics for every year that i have had my car, and it is incredible in my estimation. Sure, it costs about 4 and change, but on the bright side, if you get a speeding ticket they pay for it. No shit, they do. Obviously they don't pay for the insurance hike, but the actual ticket itself its payed for.
And yes bobby the V1 is great, but i am biased