Living room system: class A or AB amps?

Luxman monos will give you superlative performance.  Don't second guess it.

robert1976 OP Would it make more sense to get good class AB amplifiers, which can be switched on permanently without drawing huge amounts of power? I wouldn’t want to warm-up an amp first before getting good sound.

Get an Gryphon Antillion, (switchable Class-A Bias) that way you can switch up the Class-A only when you listen.

Leave it on in low bias all day, then when your ready just switch it up, and remember when you listen to a Class-A amp up to a point the louder you listen the cooler they run.

Think of it as the water pressure behind a tap washer, the pressure (is the amp heat) the more you let the water flow (listen to music) the less pressure there is behind the tap washer, turn of the tap (music) and then the pressure (amp heat) is at it’s greatest.

This is why when you listened to the massive classic Mark Levinson ML2 monoblocks, they ran cool as a cucumber, stop listening and they got very hot, even though they were only 25w full power at 8ohm, but that 25w was all Class-A.

Cheers George

Vitus SM-103
You choose between Class A or Class B
                                    Rock or Classic
A lot of power
Aestheticly speaking : no blingbling , no meters , no firecrakers.
But it is expensive .

robert1976,

     As you know, you have very high quality speakers that deserve a high quality amp,or better yet, a pair of monoblock amps to drive them.  A pair of Gryphon class A monoblock amps controlled by a Pandora preamp are very likely to be a very good match for your speakers. 
     Each amp, however, consumes 700 watts to operate at idle and up to 2,650 watts during normal operation, which is roughly equivalent in electrical consumption of 1-4 high powered hair dryers.  Due to class A amp output transistors being run with constant bias, both of the large Gryphon monoblocks will very likely provide enough combined excess heat to significantly raise the temperature of your tropical climate room. 
      Given your requirements for very high quality amplification for very high quality speakers, that do not produce large quantities of excess heat and that can economically remain powered on in an optimum operational condition on a 24/7 basis,  I suggest you may want to at least audition a pair of very high quality Merrill Audio Element 118 class D monoblocks, in your room and system, before deciding to purchase any other amps.     
     Attached below are links to a professional review and followup article about these exceptional, unique and expensive amps:

  http://www.enjoythemusic.com/superioraudio/equipment/1018/Merrill_Audio_Element_118_Monoblock_Amplif...  


https://positive-feedback.com/audio-discourse/impressions-final-thoughts-on-the-merrill-audio-elemen...

Best wishes,
   Tim

Class ?
That should determine little or nada.
Put some powered desktops on the TV and buy what amp favors the speakers most.