Yamaha CDS-1000 or Denon DCD-1600ne

Flip a coin! They will sound identical. Both are excellent build quality! 

Thanks for your help I l am looking for the best fit with my speakers.

Those 2 players don’t even remotely sound similar.

I’ve used/heard both and the Denon is a little darker. Bass is more pronounced.

The Yamaha is more crisp with more upper end sparkle.

While both are good players, it ultimately comes down to which type of sound you’re looking for.

I'm not familiar with your speakers, so can't really comment, but the above might help you out.