Thank you, Bob!
I will test.
I was REALLY surprised at my results. I had been using Startech FO converters running 50' of FO cable for the last few years. I would have made a heavy bet that I had "optimized" my network because I was using FO.
Then because of THIS THREAD and some discussing that they preferred copper over the FO I thought why not give it a try, it didn't cost anything. I was shocked when I tried the copper. I went back and forth for a week and ended up with the copper connections vs. the FO.
I think it really depends on the rest of the system AND personal preference. The FO was not bad at all in my system, it's just that the copper sound was preferential to my ears.