You could get some smaller rims with some larger sidewall's. I did that with my slammed out vdub and it made the car more tolerable. You wil get rid of road noise with different tires too, just be acreful what you pick because you could end up with something that doesn't grip the road for sh!t. I think it will be less expensive and much easier than swapping out springs/shocks. If you don't like that idea you may be able to swap suspension with someone who has a basemodel. Jump on Craigslist!

 

Because it is a Nissan v spec it has harsher spring and damper rates. You could go back to the standard models specs but it will mean new springs and shocks. A higher profile tyre on a smaller rim size would have been on the standard spec cars as well. The harsher ride and extra road noise is the price you have to pay for the tighter handling of the v spec cars.

 

If it's the original shocks, then maybe you should change them.