Like you, I didn't know what bend of handlebar to get. In the end I opted for LSL's AN1 bar. Not sure of the dimensions but it turns out that they suit me just fine so I haven't tried any alternatives.
I found the throttle cables too short and ended up buying a set for the ST1300. Perhaps more patience and alternate routing would have resolved the problem.
There is just a slight contact with the upper cowl at full lock, but no issues with the fuel tank.
I still haven't gotten around to fitting bar-end weights. The AN1 bar is aluminum and the wall thickness prevents fitting the oe weights, and I haven't yet found a good alternative. Even so, the alloy bars still have much less vibration than the oe Honda 'bars. Vibration the more important reason I went to a tubular 'bar in the first place.
Below is pic of my setup.
Good luck,