I have not read everything yet. But the Fazioli/Steinway thingy triggered me. I have the Bach Partita's/Angela Hewitt recording (Steinway) and a sample of her latest recording of these fab music, Fazioli. I did some A-B, and there is almost no difference (disclaimer: to my ears...). The devil is in the "almost", I think. The Fazioli sounds more " Bach" to my simple ears. There is a difference, a subtle one, but it is there.
I liked the Memorex ad, brings me back to my youth (and I love Ella).
This thread will be a sticky for me, it is fascinating.