Accustic Arts - Wadia?

I should clarify, I would connect DAC via a passive resistor based volume control, reason being that I do not find active pre-amps transparent, having Wadia connected directly convinced me this is the way to go.
So I am interested to hear opinions on AA DACs in comparison to other DACs and specifically Wadia, connected in whatever way, as well as any experience with AA connected directly via some transparent passive volume control, reason being that not all DACs have analog section good enough to accommodate such connection.

Teajay,
I have seen your review, which was one of reasons for this question, to see if others have arrived to similar conclusions.
Do you recall how your friend’s Wadia sounded new, was there a significant improvement over time, and if so, how long it took Wadia to sing?