I want to back up 2 of my HDCD CD's http://www.hdcd.com/

I usually use plextools to encode wav's, but wav format is only 16 bit, and HDCD is 20 bit....

The way I understand it, with an HDCD disc, the extra 4 bits of information are squeezed into the cda track on the audio CD without changing the bitrate (still only 1114kbps), but only HDCD players are able to recognize & take advantage of the extra 4 bits of info... I'm assuming that if I rip HDCD tracks to wav, that I'll lose the extra fidelity in the recording since the software isn't an HDCD player......

If I use plextools to copy an audio disc (not DAE, just make a copy) will that copy the cda tracks bit for bit? Even if I grab the disc image with EAC, that still makes a wav file doesn't it? What do you guys think about this?