Having owned the 830, VKD5 and now a VKD5SE I can say that the standard D5 has a much airier and less SS sound than the Wadia 830, which is a great player as well. I found that even though the Wadia will fly without a preamp, the digital attenuation still degrades the sound. The 830 with my BAT VK50SE was much better the the 830 on it's own.
Happy Hunting!
Paul
Happy Hunting!
Paul