What else to replace?

Hi all I have a 09 197 Cup with 56k on the clock.

I've just picked up a set of h&r lowering springs with new cup shocks up front and strut tops removed from a car with 40k on the clock.

My question is while I'm swapping these over are there any suspension/steering parts that are not super expensive that are worth swapping at the same time just as some preventative maintenance? I was thinking of swapping for some new rear cup shocks also but at £70 a preice they are quite pricey if mine are not screwed.

Also are the shock boots you can buy worth getting as the ones I have bought don't have them fitted.

Cheers all.