After nine years of constant use, I had to replace my old Marantz DV 8300, a first-generatiion uni-player from them. It had extensive upgrades, and it was used in conjunction with a Genesis Digital Time Lens, and Musical Fidelity A3 24 DAC. Both of these having been modded as well.
I acquired a McIntosh MVP 871 Universal (which has also been modded). I can switch between the McIntosh on its own, or the McIntosh as transport with the outboard DAC and Time Lens in use.
The new player was a very nice jump in overall sound quality, which was no surprise. What is a surprise is, there is very lttle difference to be heard between the lone McIntosh, or with the outboard DAC and Time Lens switched in.
I listen mostly to the MVP 871 by itself, but occaisionally, if things sound a bit ragged, the DAC/Time Lens do smooth things out a bit. The Mac has a bit more detail, but not by much.
Other than that, there is no discernable difference, but as I said, the 871 was a nice step up for me.
Just my observations, regards,
Dan