Your favorite musical non fatiguing speakers?

One more vote for the Parsifal Encore.

It features steadily falling FR from a bass hump at +/- 50 hz (in my room), except for a gentle broad elevation in the upper mid and that adds "jump" to it's otherwise mellow tonal balance. Not strictly neutral, but bright recordings are generally mellowed a bit by the falling treble, and flat recordings usually sound pretty good, too - because the upper mid plateau gets energy without etch. Bass ha real impact because the hump there falls right on the kick drum. Overall, it's a very clever mix of deviations that works much better in the room than it sounds on paper.

I currently own several high-end brand speakers already cited here (including Silverline Sonatina and Preludes, SF Cremonas and Minuettos, Maggie MMG, and Ohm 100s, among others). Each has it's own merits ans each gets use in my home or office. However, IMO, the Verity P/E comes closest to meet the stated needs of the OP.

That doesn't make it the "best" by any stretch - just IMO the best fit for the OP. As always - MMV.

BTW, I'd probably place the MMGs in second place, FWIW.

@ Kidmann, wow!, I see you do not know anything about Tara labs cables!, I laughed so hard at what you said about Tara labs cables!, Technical?, really!, your kidding, right?, I bet you do not know that Tara labs just introduced 6 new cables, A new flagship cable for the first time in 17 years!, Then you said something about gauge of the cables, The new Grandmaster Evolution interconnect sports the lowest capacitance in the industry, A mere 2 picofarads!,with dual mono-block grounding station, then the Grandmaster Evolution speaker cables are the most flexible money can buy, the linearity of a 32 gauge conductor, 288 conductors per-channel, the gauge size, Really?, The gauge size is 000, thats an area of 85,000 squaremillimeters per channel!, you really should research and go and listen, before you make such false statements about Tara labs cables, your description of ringing and not smooth is as far from the actual truth as can be!

What knucklehead tried to turn a speaker thread into a cable thread anyway???

Geoffkait, everything is involved in increasing distortion when the volume goes up.

First is your impression, even the base level of distortion becomes more intolerable when the volume goes up.

Second, the transducers, the speakers or headphones, absolutely rise in distortion with higher volume levels. Most speakers compress badly, and when compression is involved there is a lot of distortion going on.

Third, the distortion of the electronics goes up in almost all cases. There are exceptions for electronics, where the distortion goes down as power output goes up, but that's not normally the case.

Kiddman, if your theory is correct, that gross distortion in an audio system is produced at louder than normal volume by rising distortion in the speakers and distortion in the components, let me ask an innocent question: Why would anyone in his right mind spend $10K, $25K, or $100K on a system that is unlistenable at higher volumes?