Best nitrous kit

[ThatOneFastKid]

I have an 06 GT and am thinking about puting nitrous on it because I want more power without the expensive price tag of a supercharger. What is the best and most safe nitrous kit for the 05-06 GT? I wasn't sure if the ZEX kit was the only one or not. And keep in mind I am very concerned about the safety of my engine, it is my daily driver and I dont want it breaking down. I don't know anything on this subject, so any info will help.