Time is approaching when I need to have my kingpins changed.

I know there is an excellent article by DaveW on how to change them but too big a job for me.

So anyway I just want a better understanding of my options when I have them fitted in terms of pros and cons and relative costs.

First the car is a 2006 Plus 4. 27000 miles

As I understand it there are two options.
1. Stainless Steel
2.Hard Chrome

I had assumed that the "wear" was designed to be in the associated bushes rather than the king pins themselves so what is the advantage of Hard Chrome?

Is there a significant wear/mile benefit relative to cost?

Also I am tempted to change the dampers. Is there a preferred solution.

Sorry if this is all "old hat" to the engineers amongst you and I have done a search to find the answers on TM but not successfully.

So any advice appreciated.