Vinny, I've been the happy rider of an F800ST for several years. You probably have decided by now, but the one thing I'd change if I could is the riding position. While I understand the newer ones (GT?) are a little better, the bars on the ST are too far forward an low plus and the footpegs are too high and far back for me. This may not bother you but you should sit on the F800R first, especially coming from an R150R.
On the 'beginners bike' my F650CS was always referred to as one, but it was the most fun to ride best handling bike I ever owned.
On the 'beginners bike' my F650CS was always referred to as one, but it was the most fun to ride best handling bike I ever owned.
