For a tritium dial, I'd keep it original (i.e. no relume); that is, if you want the watch to retain it's actual value. If you want lume on your dial, I'd suggest that you purchase a genuine current model/service replacement lumi dial off of eBay; swap it out and save the original dial in a safe place. That way, if you ever sold the watch, you have the original parts to go with it (thus holding it's resale value).
An RSC would likely also swap out the dial for a service replacement anyways, but you would not receive your original dial in return from Rolex Service...