Man, you guys are lucky if you can own both. I'm still a full time student so my bike fund is pretty non-existent. I had to part ways with the 550 in order to get something else.
Lostboy, I considered a GL for a long time. I was even set on one for awhile, but after reading more about both bikes the BMW seemed a little more appealing. The BMW isn't as heavy, has better brakes, more modern electronics, and to my eye it looks better. But I really dig the early GL1000's with the spoked wheels. That's another "some day" bike for me, among many others.
Lucky you make a very good point. It's not polite to eat and run. I will certainly chime in and help whenever I can. Plus, like others said, many members of this forum have a broad motorcycle background with extensive knowledge and experience that applies to motorcycles in general.