I've used a few chains over the years and tried different brands but go back to DID again :-)
XTZ750:
15417km DID 520 VM
6033km AFAM DC 520 MTX 114
28050km DID 530VM Gold
23099km DID 525ZVM Gold
XT600Z:
8087km RK 520 XSO
20440km DID 520VM k�de
19982km DC 520 MXO
9131km CZ 520 ORM
4125km CZ 520 ORM - broke the connecting link
I have (almost) always used automatic chain oilers and prefer gold plated chains to the don't rust on the outside (where not much oil is applied)
I would look at
71.90 €
http://kedo.com/products/60204-110.html or maybe take the 525 variant
126.50 €
http://kedo.com/products/91526.html
but 520 should be plenty strong enough that you wear out the sprockets (and then the chain)
I also have to replace the chain on the pony this winter or early spring. I'm undecided to whether to go with a 520 or 525 chain but since the DID520 lasted 20.000km on my XT600 i'll decide based on the price of a gold chain and sprockets. Won't pay more than 25% extra for the 525 as i don't expect it to last more than 25% longer so unless i find a better bargain than Kedo's current price i'll go with 520. But it is 100% sure that i will go with the endless !