Easy decision: Do you intend to ride a lot, like more than a couple thou a year, and in multi hundred mile bites? and: Do you hate to get your hands dirty while on a trip? You'll love the ORing chain. The mileage rob is a point of contention. Google the issue and you'll get results all over, many saying there is no loss.
All modern production motorcycles that use a chain, use an ORing chain. ANd many of them are very horsepower conscious.
I was once a non believer, but having been experienced to one, on my hawkGT, I'll never go back. OVer 25,000 miles without an adjustment, and very little chain lube.