I second the excellent comments by Puerto. I would suggest in addition, given that you will be using a balanced connection, and that your W4S DAC2 has a fairly low output impedance, that you compare whichever $500 cable you choose to audition with Mogami Gold Studio, available here in a 3 foot length, or here in a 6 foot length. I think there is a fair chance that you will be pleasantly surprised, and that you may wind up saving yourself more than $400.
Regards,
-- Al
Regards,
-- Al