Balanced vs Unbalanced?

Kal, you've touched on all the points. I see no need to debate the issue.

On Ayre equipments, using balanced connections makes a world of difference - a lot of it. Don't bother getting Ayre if you intend to run rcas.

All things being equal, truly balanced is no better than single ended. Without regard to any budget considerations I only use single ended.

My sources run through 3 stages of gain before reaching the speakers. Three triode tubes. I have no noise unless I put my ear up to my speakers. I see no reason to complicate things by adding a bunch of extra stuff.

As somebody said earlier this has been debated to death. I haven't read anything so far that hasn't been said in numerous threads, including what I said.

No tubes, no noise when I put my ear up to my speakers. I see reason to complicate things by adding a bunch of extra stuff in order to improve things.

Ditto.

There is no fundamental difference in sound quality between "balanced" and "single-ended" circuits. The major upside to balanced circuits is that they are less susceptible to correlated noise picked up by interconnects, ground loops and power supplies since the balanced circuit floats inside its own insulated world.

Agreed.

I would add that balanced usually has a higher signal level (pro audio).

I would add that ground loops are quite often a problem if you talk about audiophile quality with recordings that have tremendous dynamic range. However for your average Green Day of Red Hot Chilli Peppers hyper-compressed releases there is unlikely to be any audible difference between RCA and balanced.