Channel Islands Squeezebox Power Supply?

I have the CI power supply and it was a noticable improvement over the wall wart in both detail and soundstage, as well as improved bass slam and low level resolution. I also upgraded the umbilical with a Revelation Audio cable. They were both installed at the same time so may have something to do with it. I use a Shunyata Alpha Taipan on the CI. Well worth the investment. I had not used my FM tuner while I had the wall wart installed but have heard some say the wall wart causes interference.

An advantage of the Transporter, independent of its DAC section, is it will pass 24/96 files, if that's important to you.

I use a Bolder power supply with my SB3. The difference between the stock wall wart and a "proper" power supply is huge. More slam, more bass, more detail. A big improvement in every way.

Cerrot and Ecruz, you guys are both using the digital out into an outboard DAC, correct?

Yep. Into the DAC section of a TacT RCS 2.0.