I'm 6'1" so a Tiger or GS would work. I have to admit that I grew up riding offroad so something that could do fire roads might be interesting. Always had a soft spot for KTMs...they're orange
I have Code's book and Hough's Proficient Motorcycling.
There seem to be a fair amount of GSs around, but I don't know the variations well. Plus I do like R1100S bikes, many seem to be for sale with 30-40K miles on them which I assume is rather low for a BMW.