The rings are not the only things that wears, they wear the fastest. If you are replacing the rings in your motor you should replace the timing belt/water pump unless you know that it has been done recently. The oil pump would be good. Get an ITR oil pump, you don't need it, but extra oil flow is good. Check your main/rod bearings for wear and replace them if nessecary. Replace your thrust washers. Replace all the seals. While you have the bottom end apart why not replace the clutch anf flywheel as well.