Are they good sport-touring bikes?
Yes, they make surprisingly good sport-touring bikes. Although the riding position is a bit racy, many people report that 500 mile days are manageable. My personal one-day record is just over 400 miles. That same trip we covered some 1,600 miles in 10 days and had a great time. To improve the long-range comfort, consider installing taller clip-ons, such as the ones made by HeliBars. Another inexpensive improvement is to add a somewhat taller windscreen. ZeroGravity makes several that will fit, including a very trick looking Double Bubble.