Yo Bogus,
I'm a chain maintenance FIEND, or FEIND, well....I'm pretty compulsive about taking care of my HP distributing goodies. I got, with good chain service, about 16,000 before I swapped to an EK ZZZ. I haven't changed the sprockets because I don't have excessive routing of the valleys on the rear (I still have lots of tooth), and no abnormal conditions on the coutershaft sprocket. They're perfect. The one thing about the stock chain was I kept adjusting slop out to keep it within specs, along with routine clean / lube. SO, the guys around here (professor included) recommended swapping to the EK. Some recommended the DID, but I went with the drag racer's choice. I haven't regretted it once. I have about 7,000 on the current ZZZ, no issues, all rollers still sluggishly smooth, loaded with grease, and I've adjusted it, what ?, three times to keep it around the 1" range recommended ?. "Sweet". I regularly clean with the Motorex 611, and lube with Motorex 622 heavy-duty lube or chain wax. I know Gofaster is pretty sold on the kerosene maintenance, and he keeps his intervals as well, but he's getting ready for a change at 17,000 ?, I believe. Me thinky John's going with an EK as well.
There's my recommendation.
Love mine, AIN'T changin'.......