BillDay, looks like you are getting the standard U.S. 45mpg with your brick. I have 60,000+ miles of experience with 4 of the beasts so far, and unless I am hammering my bike at 85 into a headwind I get a pretty consistent 45-48 mpg.
As for the farthest I've ever gone, it was across Wyoming through a 95 mile stretch of nothing taking a "shortcut" to get to Rawlins for the night. When I finally got to a gas station, I had about 230 miles on my tripmeter. My RT took a hair over 5 gallons. For the last 20 miles the fuel pump was screaming in agony. The pucker factor was pretty high that evening.
I commute 108 miles round trip to work and back. I fill the tank approximately every other day, at around 190 to 205 miles. I've been doing that with four different bikes for about 5 years and not had a problem. I know I can go further, but the low fuel light can be annoying at night. It comes on with my bikes about 188-190 miles when there is still a bit more than 1 gallon of fuel left in the tank.