I've had a bit of experience comparing three of the dacs you listed. Of the three, the Lindemann is the most natural and refined sounding of the lot, but as you indicated costs more than your budget. I did a full review of the Lindemann for Stereo Times and thought the unit is high value. I compared the Lindemann to several more expensive dacs including Beachmark and Weiss to name two, and it beat them all. Unfortunately, the company is no longer focusing on the U.S. market; otherwise I would have bought the review unit. I also agree with Rizzo that the Micromega Mydac is more analogue sounding than the Schitt Bifrost, though with less detail, so I prefer the Micromega. So it depends on your sonic preference on which to choose. I have heard but not compared the PS Audio, though I find the unit overpriced.
Paul