Which is better: Transport+DAC or PC system+DAC

My subjective answer to yr question is, forget it. Keep what you have & listen to music.

For the record, I tackled the dilemma as well and yes, I was inspired by the post Mgattmch mentions.

The quick answer to my experiment is, the PC (RAM to spdif out) -> DAC combo was clearly better, in very immediate terms (i.e., frequency extension, dynamic effect, liquid-non grainy violins, fuller sound, you-name-it...).

Of course this doesn't answer the question in absolute terms -- because the equipment was different & you use the clocking device w/ yr purcell and together they sound superb.

My experience was with red-book, not sacd.
Since other formats came up, blu-ray is significantly better than the other digital formats I know assuming an originally hi def recording.
Unfortunately not much choice...