From your list I'd say the Chord, it's quite literally in aÿdifferentÿleague - I've only heard the DAC64, but should imagine the 76 builds upon this....
How it will sound with the Cyrus I don't know, depends how you like your sound...I'd be afraid of it being on the lean side...
If you want to spend less, a lot less, I'd check out the Lavry DA10. I've read good things of the Stello also, but never heard one yet.
Personally, I'm holding out for the Naim standalone DAC and hoping it appears in time as I swap out my gear...ÿ