The moving target of version-less cables makes it difficult to recommend Grover's cables.
There are several IC's under $100 that are good, but all seem to lack some resolution. The JPS Ultraconductor 2's give up resolution in a way that seems to add musicality back into my system. It relaxes me to listen with these cables rather than exciting me like when I listen with the SC3's. For hundreds less, I prefer to lose a little resolution for the higher enjoyment of music.
If you're into the excitement, the SC3 is the answer.
On the XLR note, I have noticed less differences in cables than with single ended. So, you might be onto something, Mike. I have not compared extensively, though.
Also, it seems half the XLR stuff I've had in my system over the years was 'fake XLR'... where an IC chip sent a signal the XLR connector. I think my C-220 preamp did that.
Rich put XLR's on my DAC (with volume control) so I can run all balanced since my amp is balanced... but I can't run a preamp then... so no tube warmth or image beautification.
In any case, the direct connection is still quite lovely. I may go that way one day.