What are the top 3 USB cables being used today in reference systems?

Personally I feel if you have your spend over a $1000on a digital cable 
something is seriously wrong  in the design of your dac. 
The P.S audio direct stream dac minimizes the added benefit  of  spending to 
much on a USB cable. I have a AQ a Diamond  USB cable very good 
yes you can get a little better  but at what cost 2-3% for another $1500 ?
put a synergistic black fuse in there ,treat all connections with Stabilant -22 
and these improvements are much more cost effective .

For under $450 if you shop around the New NordostHeimdall-2 USB
cable is very good and on par with the Audioquest Diamond land Wireworld platinum just a bit different .Every cable will sound different
in each system.