If you like the Hyper then keep it. Don't let these peoples opinions sway yours. From the dyno comparisions that I have seen and heard of the HKS out performs most of these by as much as 10whp. Now most of these people would spend up to a thousand dollars to try and get that much whp out of other mods. I do really like that wing but put the black trim sticker on it will look better that way.
Good luck no matter what you decide!
The lucky owner of a Stage III Aztec Red 1991 300ZX Twin Turbo. 1991 ALL-STAR Automoblie Magazine, January 1991 ONE OF THE TEN BEST CARS,