If you've never used nitrous before, I would suggest that you get a 50 to 150hp adjustable system and start out small. Learn the ropes and jet-up the hp levels as you get comfortable, tuning cautiously as you go. A dual stage system is not recommended, IMHO. It's easier to setup and tune a single stage nitrous system to begin with... and you can always upgrade to a second stage in the future, once you learn how to tune w/ nitrous.
