BMW know how to make a good I6 - they have been at it for a while now!
https://en.wikipedia.org/wiki/BMW_IIIa
Any car you get will require some form of maint. - even a new one. Your call on how deep you want to climb into it or much you can afford to throw at it.
It's a real shame you folk don't get the TD over there - more torque than the V8, the simplicity of the I6 and better economy than either of them.
