Just got my PWD last night, and here are my initial impressions.
I have two source connections, a Sony Viao laptop (via USB) for playing a small handful of hi rez files I have and a Cullen Circuits modified Sonos (via Coax) with a 96k upsampled output for all my redbook content. Previously I was using a PS Audio DL3 with Cullen Circuits Level 3 mod. The Cullen Modded DL3 reached much deeper and was much more detailed/cleaner than the stock unit. I preferred it by a wide margin to the Benchmark DAC 1 (too analytical sounding for my tastes) and the stock Slim Devices Transporter (lacking in energy for me). I'm using Nordost power and speaker cables, Transparent Audio interconnects, ProAc 1SC speakers, and a Manley Stingray integrated.
Right out of the box, the PWD is immediately even deeper and wider than the moded DL3 - a bit of a surprise, but a welcome one. The accuracy and detail impressed me too. There were things I was hearing in some of my favorite recordings that I knew were there but wasn't hearing on the DL3. Thinks like the resonation of a drum hit or the pluck of the bass string that got muddied or covered previously was there now. of course, this was especially evident when I went to my hi rez recordings via USB.
The thing that has me the most excited - and was not something I expected - is the lack of fatigue. On first listen, it seemed more laid back than the DL3 and I was worried it wouldn't be lively enough for me. But the more I listened the more I realized it is just a higher quality sound. I listened for about 4 hours with almost no fatigue - something I could never do with the DL3. In retrospect, I think I was interpreting the brightness of the DL3 as the vivid sound I like when in fact I just lacked quality. Because I could hear more, I felt more involved with the PWD than I ever did with the DL3. Assuming that trend holds, I'll be very happy to be able to have more extended listening sessions.
I didn't mess with the filters much, preferring to just let the auto filter do it's thing. However, flipping around them I can clearly hear how someone may find a preference for one over the other to suit their tastes. One rolls off the high end a little quicker, one does a little better job of knocking down the clutter you get with a lot of instruments in the mix, and so on. I might even end up developing a preference based on the type of music I'm playing. Let's face it, I listen to acoustic jazz for different reasons than I listen to pop, prog rock, or classical. And yes, I listen to all of them.
I'm looking forward to eventually replacing my Sonos and Laptop with the Bridge when it comes out. It will probably help me eliminate the last bit of glare and hash I get from the Sonos. And I've never been able to get the AISO driver properly configured for my laptop, so I'm always wondering if I should be getting better there as well.
All things considered, I'm extremely happy with my first few hours. Talk to me in a month and hopefully I'm still giddy.