bike debate...

[mp183]

If you are looking for a "sports bike" there are plenty of 600's and the SV650.  These are all good for short distances and for one up.  If you are looking for something that you can sit on for 600 mile days the the DL650.
You have to be 6'0" or something close to it.
The thing just eats up the miles.  
It's great that you understand the concept of putting on the 10.000 miles on the GS. Of all the decisons you will make about bikes, that is the most important one.
Ride safe and good luck in your selection.