Just a 5mm larger TB on a stock alty, you won't feel shit.
But the more exhaust and intake mods, you should feel a little, in throttle reponse like Peterson suggested. True the money could be better spent elsewhere. But if all bolt ons are on, and you're squirtting Nitrous, then it will defiantely help. Otherwise, i wouldn't bother with it.
Also, read the other topic about this. I posted some helpful info on applications.