I also download from HDtracks using dbpoweramp.
So far I have downloaded a dozen or so albums all are excellent quality apart from two. Talking Heads - Flaming Lips. I am hearing a different mix from the CD mix.
I sent an e-mail to HDtracks and they let me pick two albums to replace Talking Heads and the Flaming Lips
There are a few posters on the Linn forum who also have issues with the mix they are downloading with certain albums.
There lies the problem. I find dbpoweramp to be very good.