Performance-wise, I think the 749 would be the way to go, just because you're getting a higher-tech engine and chassis.

However, if you just want a nice bike, and you're not so concerned with cutting edge technology, go for the 1000DS. Simple, reliable engine, solid chassis...

And though the matte black Dark color looks cool now, I think in the long run you'll like the gray and red better. That color combination will always look good...