Running Ma3 rca cables and SP4 biwire currently. I had a Mac 6900 when I had pretty much all Acoustic Zen wire and tried some Morrow SP3. The improvement was substantial across the musical spectrum. I no longer have the Mac but haven't tried any cables that made me want to part with the Morrow wire. I also really like Clear day speaker cables. They have silver in them and I find them a little more open on top. Both extremely good sound and value.
