Proac Response 2.5 - How long will they last?

I have a ten year old pair of Proac Response 2.5's.

While they still sound great I wonder how long they will last until I have to do something to them. They are never abused and play primarily Jazz, Classical and a little rock.

Are they OK "forever" or is there something I need to do now or down the road to keep them in good shape.

Thanks