I'm at 213K on the original chain, and I am just going to let it ride for now. I had a friend at work claim that he threw one at 241K, and that was the end of the road for him. I do not believe that throwing a chain always ends happily with the installation of a new chain.
'06 XK Limited, 5.7L, QD II, Black, 163K
'02 WJ Overland, 4.7L HO, QD, Inferno Red, 126K