Anybody stop using power conditioning?

Since I moved last year, I have never removed the API Power Wedge Ultra from my sources and preamps, where it supplies filtered, isolated, and balanced AC, or from my amps, where it just filters (it is supposed to work best with everything connected through it and nowhere else). I would be forced to use an inexpensive power distributor to evaluate this, but I guess I really should do a new comparision with and without the PLC, especially since I not only am in a new place, but have replaced a lot of gear since the last time I tried to evaluate the cumulative effect of the Power Wedge. Previously, I never heard a downside, and everything sounds great now too, but empirical evidence-gathering may once again be in order, pain in the behind though it might be. (I should note, however, that I can easily switch the balanced-AC feature on the sources in or out while leaving everything hooked-up and running, and that test causes me to remain skeptical that many of them could sound as good plugged into unbalanced AC from the wall.)

Musicfirst (and Sean or anyone else more knowledgeable than myself): Regarding the question of 240v lines (and disregarding your proviso about requiring a much longer discussion ;^) , isn't it true that not only can such lines potentially sound different because of factors revolving around their higher voltage, but also because of their inherently balanced nature? Albert alluded to it above, and my experience would also seem to lend support to the contention that balanced AC 'first does no harm', as you put it. For me, it has either made no difference over unbalanced AC (keeping everything else about the power delivery the same, as the API Power Wedge Ultra's switchable iso-tranny center-taps allow you to do), or it's done something positive (sometimes quite so) - depending on the component in question - but switching to balanced has never, ever caused a performance drop with any component. If I am correct in my thinking about 240v being an inherently balanced line, is this not a way Albert (or anyone) could explore (through the necessary modifications to existing gear where applicable) running balanced AC without having to purchase expensive transformers, or to comtemplate possible downsides stemming from adding any device in series with the line? Whatever else we may or may not elect to do power-delivery-wise, could this be the 'free lunch', in effect, that the vast majority of us in audiophiledom are missing from our systems?