Not an m5 anyway i was so close to buying one before the rs, but running costs are crazy and if that overly complicated box goes, you need a big service, discs pads and tyres say bye bye to a years wages !
Saying that they are epic, and the only car id have out of that list ( and the rs6 ) i just wish they built a manual for it !
Even though companys like vw make great auto boxes nowadays, i still dont think any manufacturers are quite there yet, especially in terms of reliability !