I have had both the Exogal Comet and PSA DSD in my system. Both are excellent DAC's. The Comet is detailed and very holographic, almost like I had surround sound, but the the PSA DSD was more refined and had better texture, tighter bass and sounded more realistic. The PSA also allows you to customize the sound to your liking due to the fact is has changeable software. I would have no problems recommending either one as it is a matter of taste. I ended up with a Luxman DA-06 because of its warmth and musicality but wish I had the PSA Direct Stream.
Another DAC to consider is the Marantz NA11s1. I owned this for a short while. It had the most natural texture and was very organic and musical. Female vocals and piano was to die for. However, in my system there was too much bass, otherwise I would have kept it.