CEC TL-1X upgrades. Any feedback?

Pctower, I am running through an Audio Note 3.1x. Extremely musical. With other transports, such as Linn cd-12 the presentation added detail and delineation, but lacked the massive soundstage and body. My feelings are that all components offer up some coloration, or euphemistically, a signature. I lean towards a fuller body rather than lean and taut. Such are the components I own; tube amp, preamp, and much vinyl. The upgrades claim to retain the body, eliminate grain, and extend frequency extension.

I am using my TL1-X with a John Wright modified Museatex Bi-Dat. I am very happy with the sound of this combination. I have also experienced a TL-1X with a Manley DAC and DCS gear. It is my opinion that the CEC is great just the way it is. I would have to hear a modified unit before I would lay down that kind of cash. The different musical presentation I can achieve by switching between a LAT balanced digital cable and a Kharma single-ended digital cable is all I have needed to tweak things.

I'm in the process of obtaining a TL-1X for use with my Soon-To-Be-Upgraded(again)Altis dac. What is a good digital link for use with the CEC?