As an audax owner they are brilliant. Pretty much a machine for all roads. It does depend on the fork you specify (the choice of carbon, audax with mounting points, or 853c will somewhat dictate the total flexibility of the machine and your maximum tyre width) but I have mine set up with a carridice bagman, 25mm tyres and the carbon forks and I'd happy tour B&B for a reasonable length of time. Plus they are fun unloaded. They also seem to be very comfortable, not that I've done great distances on other machines recently.
The only shadow over the whole lot is that the club tour looks to be a slightly more rounded machine. it can take more load, larger tyres, etc. without that much penalty in speed, and I'm pretty sure the frame weighs the same...