what are some good summer tires for an E39 540?

[MarkD]

I'm posting this for a friend. He's had the car since new but for some reason h has asked me what summer tires would be good for it. He wants something that has good tread life, not highest performance. I think he is thinking of Michelins or Continentals. Anyone have any suggestions? It's just for regular street use and as I said, he is not looking for ultra high performance.