...I finally pulled the trigger on my first bike:
Fuji Cross 3.0
I have no intention of doing any cyclocross any time in the near future, but this bike seems perfect for me at this time. The sturdier frame and larger tires should support my weight well, and the shifting system felt and operated much more smoothly than any of the other bikes I tried in my price range. The range of gears seems to work well for me as well at my ability level. The guys at Performance Bike were extremely helpful. I actually got a good deal of riding done (for me, anyway) on various bikes right there in the parking lot. I picked up an inexpensive light set at Wal-Mart on my way home, so I could get a short ride in that evening.
Anyway, any feedback or suggestions on upgrades I might consider would be appreciated.