@ spenav
I'm not sure what the point of your post is but I think you don't understand the HDCD format. Yes, you can play an HDCD disc on a standard Redbook player but the player won't decode the HDCD information and provide the extra dynamic range. If you want to experience the advantage of the format you must have a CD player or a DAC that will decode it. It will have an HDCD logo and a light that will come on when it detects an HDCD disc.
Berkeley Audio Design makes a range of DACs that all decode HDCD. They are expensive but they definitely support the format. One of the principles of the company is Pflash Pflaumer who was a co-inventor of the HDCD format. There are also lots of used players for sale that do HDCD.