sony scd-777 dac vs PS Audio DLIII DAC


I have the sony scd-777es (without mods) which i want to improve... I am getting a great price on a new PS Audio Digital Link III. Does it make any sense to use the sony as a transport connected to the PS Audio DLIII? In other words, is the DAC in the 777es better than the PS Audio DAC?

If the sony's inbuilt dac is not better, then would level 2 mods on the sony be a better use for the money than the PS Audio? The sony's slowness doesnt bother me, I am only interested in improving the sound. thanks
aarif
Thanks Dave_b. So your view is that the Sony XA5400ES would sound a lot better than using the 777es as transport and the PSADLIII DAC? Correct? (The two options will cost me roughly the same money.)

Also just to close the loop on my earlier question... the DAC on the unmodded 777es is not as good as that on the PSADLIII, correct?

Thanks
With respect (and looking at all your past posts) Dave_b, you clearly adore anything Sony.

So I would love to hear if anyone else has a view please.

Thanks a lot
Don't know any more about these two pieces other than what I've read but, if I were a CD and not SACD listener, I'd most likely purchase the PS Audio DAC directly from Cullen Circuits. I would choose their Level III or level IV mods that include a brand new unit that Cullen supplies ($1390 and $1490, respectively). I own three Cullen digital amps and the build is superb, with flawless function. As great as the SCD777 likely is, it's not new and all things pass. When that day comes I'd look at the best maintained/lightly used Esoteric transport I could find. In the past year I bought a P-03 that embarrasses the Sony-mechanism dCS Verdi it replaced.

Of course, any outboard DAC takes you out of the "one box" paradigm and requires addition of a digital cable. I've found that digital cables have substantially audible differences, unlike my experience with analog ICs and PCs.