VRDS Transport

After trying many transports I've decided that the VRDS system is the best fit for my system. I've discovered that the top CD only, VRDS system was used in the Esoteric P2S, Wadia 7, Esoteric p70 and Spectral 3000.

Has anyone compared these? I was wondering if one of them was executed better than the others. I would not want to have them modified, so I'm looking for the best unit in stock form.