[MENTION=376975]mrv[/MENTION] I was skeptical at first...then started to ride with them and I am completely sold. They aren't cheap by any means but they work and they work well. I would have spent maybe an hour on that mtb before....now. I can go out for 3-4 hours at a time and just spin at whatever pace i want. No problems, no back pain, i sit up straighter and i also can say my average speeds and my speed in general are not affected by the seating position.
On my VO Campeur..which I consider my heavy duty touring bike. I have a set of VO gran cru randos that i am very pleased with as well, i use bar cons with that bike. I can tell you that i wouldn't hesitate to put a set of jones h-bars on that either. strange as it may seem. And i think the fact they sweep back more than usual is a selling point for me too.
Give those randos a try....