>> Ok thanks , what would be the best choice using the analog outputs on the cable box ot Digital coax OR toslink fiber ? <<
Whatever. The difference is going to be using the better DACs found in your pre-pro rather than the ones in the cable box.
Try this, take a simple RCA connector cable and use it to connect the coax out (SPDIF) from your cable box to your pre-pro. Sounds better, doesn't it? Mine is connected right now using a Music Boy/Petra cable from StarLink-DSS, cost me all of $8.95 + shipping, sounds GREAT.
Check this link:
http://www.starlink-dss.com/Component.htm
Honest, these are GREAT sounding interconnects, a rich audiophile friend turned me on to them, his entire system is wired with them (and he can afford whatever he wants)...
-RW-