Spend the $$$ and buy a V1, you will not be disappointed.
I've had mine since 1997, and while it is expensive $399+$50 for the concealed display, ive had it for over 450,000 miles. I've had several other detectors before it, and while others come close in detection range in testing, in the real world, its a more dramatic difference than the test results may show.
For your $$$, you get one free tune up (software upgrade), and i suffered a failure about 7 years in, and Mike Valentine replaced my unit free of charge. I'm certain that if you tried it, you'd definitely like it