Todd - Came across this by accident last night:
http://www.bmwmotorcycles.com/bikes/bike.jsp?b=r1200st
I didn't realize BMW still made this bike (R1200ST). Seems it's by special order only. A sport tourer bent toward the "sport" side of the spectrum. A bunch lighter than my RS with the torqu-ey twin-plug R motor. Worth a look. Seems there are some used 05's around at a reasonable price too.
Not too esoteric that you have to send your life savings to a boutique supplier for oil filters, but still a not-so-common beemer. . .