You ain't kidding....i've seen all sorts of recommends as well with a large range of psi. At one point someone stated 33 front/38 rear which is the stock psi for the Bonnie. I've been running those numbers in my Tourances on the Scram and they are working well. I've had a few pounds less in them at times after the bike had been sitting and they felt too soft. The 33/38 appears to be great for street riding. If you are planning on spending a lot of time on dirt/gravel roads, then I would suggest less psi to help with traction and some absorbtion which is why I think Triumph lists the 30/34 for the Scram with the Trail Wings installed.
Good luck and enjoy those Tourance Tires.
They are awesome.....
C