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