Levinson 360S and the quality of assoc'd transport

I recently aquired a 360S and was surprised when I read in the manual that the ability of the associated transport was not critical to the DAC's performance. The manual claims that the internal IFO buffer stores what it reads from the transport and reorganizes it so that no jitter will degrade the sound.
Another claim suggests that it's not necessary to spend a large chunk of change on a digital cable. I forget their exact reasoning but the view was supported by a local guy working in a high end pro music shop who works in the field. He did agree that analogue cable were another story. The tech said that since the signals were carried in the digital domain, it was immune to the signal degrading effects and losses of the analogue domain.
I'm currently using a Sony scd-777es as my transport. Does anyone have experience with these issues and want to chime in before I spend $500 on a so called "high end" cable.