its not going to be cheap to do it safely. i would say get an NX kit. they seem to produce more tq. than other kits. make sure you get all the saftey goodies to go with it RPM/window switch, bottle heater, purge, flip chip, tune etc....
I second the NX kit. Along with buying it purchase the Genx2 upgrade well worth it if you want the most out of your nitrous experience. No need for a tune or anything like that. Just run 2 step colder plugs and you will be set to go. Also make sure you purchase a W0T switch and a MSD Window Switch.
After the 1st time you run your NX pull all the plugs and check for lean/rich condition and adjust your timing from there. Stock timing should be fine or you could bump it a degree more to make it run a little richer for safety purposes if lean conditions apear on the plugs.
NX wet here also I just finished installing mine but I have the new plate kit. I did a little street testing and Its a great feeling when you hit that button. Make you get all the safety equipment or you will blow something up.