<font color='#000000'>I'm actually going to have to disagree with some of you. I don't know how a cheap toslink and a good coax would compare, I don't use toslink. I have however, upgraded from an AR coax to a Cobalt Cable coax and there is an audible difference. It's not huge but it's there and it was enough for me to justify the $40 (not that bad a price).
The Cobalt seems to do a slightly better job at imaging, sounds a bit smoother, and is crisper on the highs.
As a side note, I also bought Cobalt subwoofer cable and that actually did make a very large difference in my subwoofer. It's deeper, fuller, and quicker than with the RCA brand cable that I was originally using from Best Buy.
To anyone who is curious, check out Cobalt. They're GREAT build quality and the sound has made a difference in my system. With their reasonable prices and 90-day full refund (no shipping) return policy, you can't lose.</font>