I've used the Shinko's 705's also on my 04 R1150R and 02 R1150R. We took the bikes on a 6,000 miles ride and I'm glad that was our tire choice. They handled fine in the dry and excellent in wet conditions. We were caught out in some heavy downpours causing flooding across the road and they handled while other bikes were washed off the road. They also gave good confidence when we took to dirt roads.
I should ad that they did give a rougher ride and the dry handling didn't have a great feel like a sports/touring tire does.
If I go to Alaska again it will be my tire of choice, good off road and the mileage is good also, 9,000.
Thank you for sharing your experience and opinion. I may put some 705s on my RT when these Roadsmart 4s wear out.