Thanks Steve, as a two channel Mac user except I have tube pre and ss amps, the WW Platinum Eclipse G7LS is something to consider. What are you using for speaker cables?
Yes, apologies for the acronym. LS meaning, loudspeaker cables.
The WW Platinum Eclipse G7 are very well constructed. They are stiff, yet not prone to vibration from the loudspeaker terminals. I have wrapped them in Techflex F6 Quiet for additional vibrational control. Something I like to experiment with on loudspeaker cables in general. They are sitting on CableIsolators too. The cable has good RF noise rejection ability. I have had a meter up against them. I am particular about noise rejection ability & have been drawn & quartered about that discussion in the past "over there".
The WW G7 now incorporate the UniTerm termination system. Some other manufacturers are following suit. It's a good system, on the Platinum Eclipse, they are solid silver spades or bananas. A little on the soft side & I have yet to see if they oxidize. They probably will. Personally, at this price point, I would prefer more termination options like Siltech do.
If cost was no object, I would prefer something up in the Siltech Royal Signature G7 range. As the OP poster said above, smooth as butter. It's a golden sound at a golden price. The construction is second to none with the Kapton, heavy shielding & Furutech Flux termination option. That was the plan originally, but I was offered a substantial dealer discount for a WireWorld bundle. The price point was essentially wholesale at the time. No strings as I understood the deal to be. So if you are considering WireWorld, shop around & push the price!
WireWorld Platinum Eclipse are a great match for McIntosh equipment, especially tube. Silver does its best between the pre-amp & amps from my experience. Because I have experienced Siltech, the XLRs will someday replace the WireWorld Platinums at this stage. That said though, the WW Platinum Eclipse G7 are well up there performance wise & for now I can happily live with them as they continue to improve.
When it comes to any silver loudspeaker cable, you may want to demo against your Vandersteens & MC601s first. I'm not sure how resolute those alloy dome tweeters are. My loudspeakers use a silk dome tweeter & it is a perfect match after graduating from a silver plated copper wire. As for the XLRs between your pre & amps, I'm quite confident that you will benefit nicely with silver interconnects.
Given my current equipment inventory, the move to solid silver core is one of the best transitions I have made.
As for the Magnum Opus, I have heard good things. Try & demo if you can! They use Furutech Flux terminations. I use these plug terminations everywhere else. They are awesome but do take time to burn-in given the rhodium plating.