Best Digital Cable, Regardless of Price....

I actually own a CEC TL 1 drive match with a FORSELL AIR REFERENCE dac.I use a 1 1/2 meter VIRTUAL DYNAMIC NITE (with RCA) as a digital link.I like it very much but i wonder what is the next step to a better digital?
- few sugestions:OMEGA MIKRO EBONY, VIRTUAL DYNAMIC MASTER SERIE, SILTECH...
- Also 1 1/2 meter is suppose to be the best lenght for a digital ?
- so folks let's go for the digital i.c. of your dream !!!