I have the 8500 x50 and have a lot of experience with the Valentine V1 and both are good units. The V1 has a better range but the 8500 has been great for me. I haven't used the 9500 yet but it does have GPS that will keep track of false alarms. From what I have read that seems to be the only big advantage between the V1 and the 9500 or any of the newer units. So you will have much less false alarms with the 9500 over the V1.
Like said above, if the cops in your area are using laser the detector won't help at all. However, in the three years I have had my detector I only had one cop actually using a laser so that may not be a big deal. It has definitely payed for itself many times over so it is worth the money.