Nitrous and turbo is a great way to make power and still be safe. This is how the thinking goes:
Say you are running 8psi for example and no nitrous. The inlet temperature is going to be x.xx degrees. This hot inlet temperature is a great source for detonation.
NOW, run 8psi and a little say 35hp shot of nitrous
You will be making more power (prbably in the vacinity of 50hp with 35hp jets) and be as safe if not safer because the inlet temperature is drastically colder which helps fight detonation.
One thing to do is run in the neighborhood of say 5psi around town which is very safe if properly tuned, and nitrous on top of that for when you need it. it is a very reliable combo and the same as running say 8-9psi (just for comparison) but safer because you have the same cylinder pressure, but a much colder charge!