All very subjective and in the context of my own ears and system:
The HDCD version of The Yes Album turns out to be a huge disappointment to my ears. It sounds like a muddy, muddled mess. Big bloated and slow bass, grating mid and treble and what I can only guess are digital artefacts in the high frequencies. Its true that the wider you open the window, the more muck flies in, but I believe the clicks and buzzes have either been artificially exaggerated by the HD process or introduced as a result of it. The Rhino remaster in comparison sounds detailed, open and above all fast and tuneful. Since Im such a sad Yes fan Ill hang onto the HDCD. The packaging is a thing of beauty and who knows, as my rig gets better in time I might appreciate it more.
Going For The One on HDCD turns out to be a bit of a gem (to my ears). More open, detailed and cleaner than the Rhino release (itself no bad effort), with lots of layering, good separation and fast, punchy but well weighted bass. This is what I expected HDCD to sound like the same but more. Like The Yes Album (and all the other releases Im guessing) the packaging is a joy to behold and hold.
Relayer is still on order. Looks like the result could go either way.
If thats of any use.
Cheers