I will most likely be adding nitrous (and a larger fuel pump....and a clutch) next year. I haven't had a car yet that hasn't had nitrous.
This car needs a progressive controller though, so that is the route I'll be taking. I'll probably use 1st gear lockout as well.
All I can suggest is for you not to go overboard with the nitrous setup. If you start getting too involved, you might as well reconsider and go with a blower or turbo.