What digital cable between levinson 360s and 37?

I used the Transparent Cable Reference AES/EBU 110 Ohm Digital Link between a No.36s and No.37 and it compliments these components quite well.

Deluxe, For ST Glass cables: I've tried the Krell "Full Spectrum" and the Straitwire "Stx". But are these true Quartz Glass or just Fiber Optic? They are very small in diameter (1/8")and very flexible (no outer cover, sheathing, etc.) True glass fiber is going to be better than fiber optic, look at what is being reported on toslink. chucker

thanks for the onfo chucker. :) i think that any it'd at&t/st format cable is true glass fiber ???

Sorry to chime in so late, but I too am running the Levinson No 37/360S combo (feeding a No 32 Preamp).  During my trial & error period, I tried the Transparent Reference AES/EBU as well as Better Cables Silver Serpent and a 1/2 dozen or so other cables I can't remember now.  I reluctantly borrowed a Nordost Valhalla AES/EBU from my dealer and within a few minutes dialed him up to place an order.  Not a cheap date, but the Valhalla removed several veiled layers, improved dynamics, tightened up the bass, dropped the noise floor a ton and improved things in nearly every aspect.  That was about 10 years ago and I've never looked back.   

This is the one I like and use KLEI gZero3D SPDIF/Coax IC.  Even for digital, it sounds very analogue and organic in character and has been my preference for the last couple of years.