What is water cooling likely to do for maintenance intervals? Are valve checks/adjustments still going to be every 6k? If so I am thinking that folks concerned with frequency or ease of maintenance (as I am) may look at other bikes like the Super Tenere with 26k valve adjustment intervals.
As much as I love my GSA, and boxer motors in general, if water cooling only gives a bit more power, a little quieter, but comes at the expense of more difficult routine maintenance at 6k intervals I don't think it will be that attractive to anyone that rides a fair amount. If the liquid cooling gets it close to the longer service intervals on competing bikes it would seem a lot more attractive.