I've been in the 2014 RR at an event. It was GORGEOUS inside and out. Very luxurious, and I'm sure it will still maintain its off-road prowess. But RR is not known for its reliability, so that is a lot of risk to take, especially the first year. But congrats on the M5!
ED on 7/18/2014: 2014 550i, Space Gray, Mocha. M Sport, Cold Weather, DAP, Executive, Lighting
PCD on 9/6/2011: 2011 550i, DSB, black/oyster. Prem 2, Conv, Ventilated, HUD, Sport, DHP, SAT