I know what I'd do.pulsarboby said:yeah you have worn rings, but in all fairness those readings arent excessively low, unlike the first readings you took!
if i were you i now wouldnt bother with the rebuild untill it got worse (it may be ok for months & months) the readings are all pretty similar which is a good thing.
get the most from the engine you have, and when it does eventually decide to call it a day, then rebuild it;-)