Channel Islands Squeezebox Power Supply?

Based on your equipment list, I'm surprised you don't just shell out the cash and try it. When I added it in my system, I noticed an improvement in bass slam and an overall sense of the music being a little smoother. Also, you could probably try a nice powercord for an additional gain in quality. Noticeable with analog or digital out.

Given the rest of your gear, if you want to go wireless, get a Transporter.

This isn't helpful guys.

Jig you used in your system with the digital out in a DAC?

I have the VDC-SB and I believe the improvements are modest. I have only had the VDC a couple of weeks, so there still could be some break-in. Also, I use a monarchy upsampler between the SB and my CDP, so the effects may be masked so some degree. I need to remove the monarchy and see if I can better detect the impact of the VDC, but just haven't gotten around to it yet.

I would suggest looking at the Bolder Audio mods to the player and their power supplies, both of which have been well reviewed. There's a forum over at Audiocircle.com.

As to the transporter, if you're using the digital out into your DAC, the transporter's not worth the extra expense, IMHO.