@roberjerman: I hear you! I have tried almost all Class D chips. They have something that I do not like in the highs which I cannot pinpoint. However, TA2022 chip from Tripath (only this chip) is different for me. It has the closest sound to Pass Labs Aleph 3 which I once owned (I feel weird using Nelson Pass’ name in the same sentence with Tripath but this is what I hear). I think Sphinx has Hypex UCD180 boards (they are from NL, MAYBE their boards are made in China or at least most parts are from China) and I have heard their "better" Ncore NC400 and I still liked the TA2022’s sound better. My brother who actually owns the NC400s fully agrees with me but he still likes his Pass XA 30.5 better.
@ebm No, I have not seen it sold for $300 but have seen it sold for $350 (fully working). You just need to wait. Actually, today someone purchased a PV-5 below $500 (no not $499, below that)! So, yes it is possible.