A friend who fits the Jones loves it. Sadly I'm too long for one, so have a Surly. They are both excellent for long relaxed trips (did a couple of 90 k days with full kit recently). As a 59 year old, I'm probably in the same sort of league as you.
Just noticed the singletrack part. I can get down pretty much anything on the Surly, not always as quickly as on a full sus, but certainly achievable.