I saw the R1200c at the Javits center in NYC when it first came out in the late 90's and was seduced by its oddity.
On BMW reliability:
I had a 2006 K1200R naked.
Fast as hell, handled like a dream, got 45 mpg.
I put 10K on it the first year.
Then the transmission stopped shifting during a ride. Couldn't get it out of 2nd.
Cross Country BMW in Middlesex NJ fixed it under warranty.
A few month later it started again.
I paid 12.9K new, sold it to Cross Country for 7.4K, without buying another bike from them.
Very expensive year of riding.
Got the Rock a few months later.
Compared to the BMW the rocket feels and handles like a Mack truck.