... the F10/11 especially if specced well. My F11 has Oyster/Black nappa leather with optional memory Comfort seats (memory on passenger side too). I love the contrast in colours whilst remaining practical having the lower parts and carpet in black. I clean and nourish the leather twice a year with gliptone. Recently did over 700 miles in a day (West Coast of France to Cheshire via Calais/Dover) and the seats are just amazing with adjustable lumber, bolster and double back rest:
Comfort seats are one of the things that keeps me coming back to BMW at car change time. It's baffling that no one else makes seats with the range of adjustments that BMW offer.
My F10 has the same interior, it was one of the main reasons I bought the car. I was really hoping to buy a 535i but after a test drive, and experiencing the comfort seats I just couldn't refuse it! It only does about 500 miles/month but I still clean the leather about every 3-4 months (using AG currently).