Benefits of MF V-Link with a Mac-based system?

I used a V-Link between my iMac and a DAC that didn't have optical input so that I could use the coax input on the DAC. That worked well and sounded better than the USB option but I eventually replaced the DAC with one with optical input and no longer needed the V-Link.

The optical to optical sound is better than the previous setup but that's most likely because it's a better DAC. The V-Link works really well if you need it but in your case I doubt there's any advantage to having one.

Many ppl claimed much improved sonics when using V-Link, and especially V-Link 192, with Rega DAC.

To the reasons stated above, I would also add the posibility to play HD files. Rega USB input is limited to standard, 16/48kHz resolution.

V-Link will let you play 24/88 and 24/96 files. V-Link 192 will also play 24/176 and 24/192 files, and will sound much better overall due to tighter specs than the V-Link.

Thanks guys, I think I understand better now. I assumed initially that the V-Link was mostly being used by guys with no optical port on their computers, but then I saw posts from guys who were in fact using Macs with optical, but were using the V nevertheless. OK, well I think I'll just leave it alone and go with the direct connection.

Realremo and Ray: Thanks for the tips on the software. Actually I was planning to use Decibel. I haven't yet compared all the options, but I've tried Decibel and the improvement over ITunes is significant. Amarra seems a little pricey. Never heard of Audirvana Plus, but I'll try it.

Realremo, another question: You are using both Wireworld and Lifatec. Do you really find significant difference between the two?

No, I think I wrote in my post above, I cannot hear significant differences between the Wireworld coax and the Lifatec optical cables, whether the transport is my Denon changer or my laptop and the Vlink.
Keep in mind that the laptop-Jplay-Vlink combo can beat my changer's sound quality as a transport, but I found no difference out of the Vlink when swapping cables.
The biggest sonic improvement happened when I DAC'd the changer. Then I wanted to go USB into the DAC, so I could run my entire collection from an iPad, and the USB on my DL III was not as good as the sound coming from my CD changer. So that is when I purchased Jplay and the Vlink. Now the sound is better, but not by much, it's a subtle improvement. If I wasn't using my work laptop, and had to buy a laptop *just* for PC audio, I'd probably say the money wasn't worth the sound upgrade. That would almost double my PC audio investment, and I'd rather put that much dough into new speakers.