[dunk1]

I'd be looking at the calipers before replacing anything. Had all mine replaced due to them beginning to seize up which warped one rear disc

 

[dunk1]

If they've not been refurbished or replaced for what it costs i'd bite the bullet and get them done. One of my rears seemed fine when it was inspected but it was just starting to fail. Same on the front and cost me a set of discs