I am fairly new around here so dont take what I say as gospel but I do not beleive you will run into very many issues.

I have seen an SRT6 for sale that had converted to the pop up wing so it CAN be done. It wont be a direct bolt on though, you will have to do some wiring but shouldnt be TOO difficult.

Springs are the same size just stiffer, if you want a softer ride you could go with the N/A version but as for looks it should be the same.

Not sure on the wheels, the brakes MAY make it a close fit, I THINK you will be ok but worse case scenario a small spacer would work.

As already mentioned the side skirts are the same but the front "lip" is different and not a seperate peice, you would have to swap the entire bumper cover.

I actually admire your ambition to make the car what you want. I love the car in white and if it was offered in an SRT I would probably be looking for one. I dont have the time or cash to paint one and I like the SSB almost as well so no huge issue but I love the fact you are willing to make it happen.

I havent decided if I will go through with it but I really like the pop up spoiler so I may try to swap the SRT spoiler when I get my Crossfire... Not 100% sure yet, will keep the SRT spoiler for a while as it may likely grow on me.

While your location may make it difficult, the good side is, you can likely find someone with an N/A who will be happy to swap your parts out. Even if you paid to have the spoiler and bumper you traded to the other person painted, you would still come out ahead of trying to just buy them outright.