HD Tracks 96/24 and USB input on DAC

I'm just ramping up on getting some quality audiophile gear, and am trying to understand the concepts before I get something that doesn't do what I want. For example, for DACs I have been looking at in the <$700 space, if I am using a laptop, or system without S/PDIF output, it seems I'm limited to a 44.1k/16 bit (or lower) data stream. That is "OK" for CD based content or CD FLAC files, but for DVD-Audio or HD Tracks 96/24 it seems I would not be getting the "full" value of my source to the DAC.

Am I correct? If so, it seems to me that the only option to get 96/24 may be something like the Hifiman HM-801 where you can get the source FLAC file directly to the DAC via SDHC media card, because neither S/PDIF or USB support that data rate (only HDMI?).

Also, I believe it has been already confirmed, but to be clear, there is no way to get full quality SACD digital source to an external DAC without a downsample via S/PDIF output since HDMI is only way to get full source quality and so far no external DAC support that transport. I was thinking of getting an inexpensive SACD player for the office to connect to a desktop DAC + AMP setup, but that seems like a non-starter.

Thanks for the input.

I stumbled on Computer Audiophile site which seems to be very focused on my exact concerns. I was thrown off by the DAC/Amp units I was looking into were only 48/16 which seems to be a limitation of USB 1.1. As you stated, there are USB 2.0 HS devices that go all the way up to 192/24. Now I need to determine what is best for my requirements. Thanks for the information.