ftk and springs?

[urbandork]

im thinking of getting a lighter spring in my p90tr due to the restrictions at local arenas

 

i currently have a pdi spring in it and i was told that systemas springs sound very diffrent. Ive also heard good things about gaurder spings and ftk's

 

What i guess im trying to do is to get as many point of views and comparisons between the diffrent companies ftks and springs as pertaining to what they sound like.

 

also whats the sound diff between a poly carb set up and a metal one. are there any real diffrences in wear, tear and sound.

 

thanks in advance