I just rewired my HE-6 using the stock silver cable which I terminated with gold plated Nakamichi babana plugs.
This is plugged straight into my Norh LeAmp monoblocks...
The difference between this and the previous wiring using the copper Hifiman cable with XLR to XLR adapter and banana plugs is quite amazing!
Basically I have eliminated a male and female 4 pin XLR and extra cable to the banana plugs.
The only downside is that I cannot easily disconnect the HE-6 without reaching behind the amps.....but the sound improvements are worth it!