Harbeth 40.1 - Need some tips on placement from current owners.

I agree with your description of the M-40.1's being full bodied and natural sounding.  They just sound right to me.

I compare my 40.1's to my previously owned Dynaudio C4's as follows:

Dyn C4's are like a sports care:  fast, exciting and electrifying... but after a while, you tire of listening too them and you just want to relax and enjoy the ride.

The big Harbeth's on the other hand are like a fine luxury car:   smooth, powerful and great for long rides.... never tiring, always enjoyable and good for the soul. 

Perfect description! Agree 110%. 

may be you have to try luxman power amp ,I see you have luxman dac,may be the sound will be more controled without thickness

I am trying out a Job 225 to see what solid state does with these speakers.

Bill the Harbeths will sound great with any quality amp ss or tube.  You will have fun.  Also bring out your jazz cd's and enjoy.