for a turbo kit,put one together yourself so you can get exactly what you want,something that can be used later for possible boost increase and something that is gonna offer more power increases for the money.all of that is anti-greddy kit or any pre put together kit like that with the exception of a few GOOD ones such as full race.if you dont know anything about turbo setups go to homemadeturbo.com and get a grasp for everything you'll need and what is best for your goals and setup,its really not that hard if you research good.as for the nx system just completely forget about it,you dont need it,and it doesnt help out enough to spend that kind of money