^^ I disagree with your opinion as to what constitutes an acceptable dress shirt. In addition to the Mercers (both straight and button down collars) I have a number of Charvet MTM shirts with a medium-wide spread collar for which I specified the softest possible collars and cuffs. I beleive these too are unlined and unfused, and are as soft or softer than the Mercers (much higher quality shirtings of course).
The Charvets look great with or without a tie. I take all these shirts to a laundry that hand presses, to avoid the sometimes undesireable creasing that occurs in pressing these types of collars and cuffs. But I think this is worth it for the comfort they provide while wearing. I generally feel the choice of collars and cuffs in this context is a personal preference. Sure a stiff, fused, lined collar presses better and looks very sharp, but in my opinion they are also uncomforatable and can feel sharp against the neck and wrist as well.
The Charvets look great with or without a tie. I take all these shirts to a laundry that hand presses, to avoid the sometimes undesireable creasing that occurs in pressing these types of collars and cuffs. But I think this is worth it for the comfort they provide while wearing. I generally feel the choice of collars and cuffs in this context is a personal preference. Sure a stiff, fused, lined collar presses better and looks very sharp, but in my opinion they are also uncomforatable and can feel sharp against the neck and wrist as well.