A couple of other notes I forgot as I was being hassled by security to leave the office last night.
The R1250 had shift assist which worked well all the way up the box if you were accelerating, but not so well down the box or if you were just changing up or down at more or less constant speed. I'm getting reasonably handy at clutchless shifts up and down the box on my K now, the shift assist is quicker when accelerating hard but otherwise I wouldn't miss it. The S1000 shifter is better up and down but as I said above you are rarely at a constant speed.
Compared with my K the throttle action on both bikes is very light, maybe my cables need lubricating
The mirrors on both bikes were pretty poor, style victims. Even though the RS are very slightly wider than the K, like 20mm, I struggled to adjust to see more than my arms, and when I could see behind they are slightly too small I think. Not that you need to see what's behind you on the RR...
The exhaust on the R1250 is an ugly lump. It never got in the way and you can hear it, but if there was an aftermarket one out there that had the same effect as the Akra on mine it would be first on my shopping list. The Akra option from BMW makes no difference to the power output apparently, just lighter and different sound. Whilst talking about looks the new bodywork is better than the old, and its growing on me, not too Transformer/scifi - ish like some of the bikes out there at the moment. The bike is fairly slim, apart of course from the bleedin' great pots sticking out at the sides
The ability to bluetooth the dash to a phone app sounds interesting, but I don't know how it works. My test bike was prepped for a satnav, but if you have your phone do you need a sat nav?
The RS had the fitting for the panniers on, neat and not very obtrusive, didn't get in the way
As for other replacement options, I met a guy on the Chunnel who reckoned while the 1290GT was very good, it vibrated a lot. He was with his mate on a Sprint for a quick tour of the Benelux and had an older RT at home for commuting, but not a boxer fan and did not like GSs. Thus having been around the houses he rides a Tiger 1200. Another bloke had a ZX10 and was on his way back from a week in the Alps. They all looked fine in my mirrors.....