hell, like you said UK, dynos are just for braggin rights. If you are doin some big turbo and want to see the best possible numbers, sure, the dyno is good. BUT, if you are getting tuned with stock parts and some bolt ons, i would just worry about the street tune b/c that will be were you drive all the time. I've had 2 street tunes and loved both of them. What are you having done to your car? What mods do you have already??