I want NOS...where to get it?

OK, I am going to buy NOS with my tax return (which is going to be pretty hefty). Anyway, I dont know where to start...where to get it. I was thinking about ARDperformance.com but they dont give very much info on what they sell. There is a NOS kit called "NOS Power Shot Kit (Universal)" and "NOS Sportman Fogger Kit (Universal Fuel Injection)" I dont know the difference. Can anyone help me out? Maybe suggest a better place to purchase from? Thanks.