Wow, lots of activity here. Since I stopped experimenting with new equipment a couple of years ago, I haven't been active. So no, I don't need to shelve my transporter. Like dminches, in addition to my transporter, I have several other squeezebox devices: a radio, a squeezeboom and a duet. I love using the squeezeserver to feed music throughout the house, but the recent introduction of the smart radio and lack of compatability between its server and older squeezeboxes leads me to question Logitech's ongoing support.
In my experimentation with computer based audio from ~1995-2008, it never sounded as good as my stand alone CD player. That changed when I acquired my Modwright Transporter. I (perhaps out of ignorance) attributed this to not using my sound card (I settled on a Lynx 2) or USB output to a DAC (and I tried several), but to using an ethernet connection feeding the file to the transporter. I have been a JRiver user for over 15 years. Whenever I used USB or the Lynx soundcard, something seemed to get lost in the timing and coherency of the music relative to Transporter or my CD player output to the same DAC as the computer.
Now I am wondering if there have been advances in using digital interfaces such as USB that can transcend and also position for the future (although I guess digital is advancing so fast that trying to future proof is a futile effort).
Perusing AudioCircle and some other info sources, the AMR DP-777 and the Meitnik MA-1 both sound interesting. Of course they would use either the USB output or the Lynx output (either spdif or balanced), and I am a bit worried about the loss of coherency that I always observed with previous computer --> DAC interfaces. The PS Audio PerfectWave DAC does offer a network interface, but I suspect that it won't have the lovely tone quality that I've managed to build with the Modwright Transporter, especially after tube rolling.
I do notice that many of the folks who were active in the transporter tube rolling thread have moved on....presumably to something they liked better. Thats what I am curious about, because 2-3 years ago, we had similar tastes.