Z-Systems RDP-1

I am considering buying a used RDP-1 to use as both a digital equalizer and replace my current preamp, a McCormack TLC-1 Deluxe. I will be running into either a Camelot Uther or MSB Gold Link III DAC straight into a McCormack DNA 0.5 Deluxe Rev A power amp. Can anyone whose had experience with the RDP-1 give me any guidance about the wisdom of such a purchase, things to look for or be careful about, or general impressions about the RDP-1. The reviews sound great, but I imagine there is more to the story than what I've read!
I had the unit and I think it definately imparted a metallic and sterile quality to the music. It truly sounded like a computer attempting to make music. I talked to the Z-Systems about this and they said trhat perhaps I had an older unit with older firmware. I don't know if that was the case or not, I just got rid of it and never looked back. I definately suggest if at all possibel you audition the unit in YOUR system. Listening to it in a dealers showroom is NOT enough.

Best regards
I typed the previous post too fast. I apologize for the spelling mis-steaks (just kidding) :) mistakes.


1. I do not think that the RDP-1 imparts any significant character to the sound.
2. If one is using the Camelot Uther DAC, one does not need another switcher/volume control since the Uther has multiple, selectable inputs and a very nice analog volume control, both of which are accessible from the remote.