yea, new sliders and repair any other damage, their insurance foots the bill.
I would visit a few shops to get quotes for the damage. Have the other person's insurance mail you the check. fix the damage and replace the sliders.
Did they hit anywhere other than the slider? If not the suspension should be fine, I would be worried about the side hit bending the frame but all depends on how severe the hit was.
Sometimes the shops will get a little overzealous, my friend had his airbags go off in his frontier, they replaced the whole frame because of a small scratch done by a rock.