Audiophile USB to PCM


I have an excellent upsampler and dac (dCS Purcell/Delius) and am looking for the very best USB to PCM conversion. So far, I've tried SlimDevices Squeezebox, and Xitel Pro Hi-Fi link.

Both are very good, but I was wondering if there are any other options I should be considering. Both the Sutherland USB Preamp and the Wavelength USB Dac convert to analog. I'd like something of similar quality that stops short of the digital to analog conversion so that I can let the dCS gear do that.

Any suggestions would be appreciated.

harry
hbrandt
Is there a good online source (Canada/US) for the Waveterminal U24? I am looking to getting started on a hard drive based system using an Apple powerbook.

Thanks,

Rene
Sadly, I gather the Waveterminal is no longer in production. So, if you can find one, its probably an endangered species. I'd just froogle it or google it and see if there is a decent deal out there.
This is probably old news to most of you, but I just noticed that the Outlaw 990 SSP has a USB input for receiving an audio signal from a PC. Their web site does not explain what type of signal (untainted 44.1 kHz?). I can't comment on the sound of the Outlaw. But it's good to know that equipment makers may be moving in this direction.
I had been looking into establishing a PC based music server. Many of the posts on audiogon suggest improvement in performance by replacing the transport with WAV files on PC. Other's note improvement from using USB connections. I have been comparing CD played through Levinson N390S into N32 pre Amp, and Levinson 334 Amp. My speakers are Wilson P7. I have not found the pc Audio to equal my system The Xitel Pro Hi-Fi link connected vis Toslink ton 390s DAC was just fair. The HagUsb is very good. It connects Via RCA digital to my DAC. I found that Flac at its lowest compression was not nearly as good as the best WAV file. Windows Media was not nearly as good as WinAmp set on Direct output. Foobar was closer to the real thing but Less transparent. I do not feel that the HagUSB plays a role in the change in quality In talking too its designer; there are still drivers running in windows that affects the sound. Apparently the new windows platform will reduce some of these issues.

I must say that the sound quality is still very good but not yet equal to the best.
i am also planning on creating a decent PC-based music server for my stereo. now, which way to go? via Stereo-Link Model 1300 USB DAC, or Slim Devices Squeezebox, or should i get the music to my amp through Apogee Mini-DAC (most expensive of the options i mentioned).
which would be best sounding, anyone made comparisons? I don't have a standalone DAC in my system.