Go with NOS, or NX.
Dry kits are simple and pretty safe.
They cost $359 ar
SchnitzRacing.com
You can adjust 20,30, or 40 horsepower with a stock kit.
You should use a PowerCommander, or some sort of fuel management system to tune the bike, before using the nitrous.
A dry kit comes on smoooooth!
You will enjoy it!