You have two completely different type of tire choices there.
The Kumho's are a summer performance tire.
The Dunlop's are a all season performance tire.
I had the Dunlop SP Sport 5000's on my 17's and I absolutely loved them.
They wore very nicely, they were quiet and they handled the dry, wet and winter weather perfectly. If you're looking for a four season tire I would definately go with the Dunlop's.
I liked my Dunlop's so much that when I upgraded to 18's I fit them with the Sport 9000's and I put a set of Dunlop's on my winter wheels.