sounds like you are ready to buy them regardless of what people say.
like simba said, the gains are not very much, where as there are a lot of risks. i dont have them, and i wont have them, simply because there are better ways to make more power without the risks. your car is stock for all intents and purposes... drop in filter, plugs, and synthetic isnt exactly modded.... if you want real gains, get an exhaust, a downpipe, a boost controller, something that will make a noticeable difference without taking a huge risk of damaging something. just my opinion, but like i said you sound like you are already sold on them so anything anyone here says isnt going to make a difference.
even the people that dont have them know they dont make much difference in hp... difference in hp is the point of modding.. not just to say you have something... at least thats how it is for me.. what im getting at is why not do the mods that will net you some noticeable gains first, before doing the things that get you little to nothing.
Later,
CJ