Looks like you had a good visit to a BMW dealer with so many of their models listed. (ha ha) Anyway, the BMW models don’t get mentioned too often here, but I have been taking a look at them myself. I’ve sat on the G 650 GS and it felt pretty tame, and very comfortable in it’s riding position. Also, by what I’ve read on it, and with your experience, I would bet that it would be a good beginner bike for you. The other BMW models, however, sound like too much to me. They are around 800CC (including the F 650 GS), which I wouldn’t recommend to anyone for their first bike. If you look around on this site, I know there is at least one other person who recently got a Gladius for their first bike, and they love it. It could be right for you as well. It definitely has the price advantage if you’re going to start with a brand new bike. No matter which you choose, just take it slow and cautious at first, as I’m sure you plan to do, and Ride Safe!