60-80k in 2-3 years? That’s quite a daily.

I don’t think the E53 is particularly pleasant on the highway.. it will likely have a fair amount of wind/road noise and if it has a sunroof (most do) it will have more wind noise.

You can make an E53 reliable. I would add the hard coolant pipes and a brake line refresh to your list.

Unless you have the time and interest in fixing the many niggling issues - some serious- I do not think an E53 is a good choice.

I chalk some of the E53 issues up to the fact that it was an early US-made car.. quality was not as good as the European-made BMW’s IMO…

I have owned two E53’s and drive one daily now…