quick question... If you like the height of the car, but you plan to switch out shocks and springs, at which point would you replace the spring pad or are they good for ever?

I have already done the springs, so obviously I wanted the car lower, but its good now, scrubs only when backing up and turning. Im getting ready to have shocks put in and want to have it all right once it gets buttoned up.

Anything else I should do when im down there, arms, ball joints etc. 138K on this car. Runs like a dream! but some vibrations around 55-65mph. (balanced 3 x already)