For fuller sound at lower volumes, I'd suggest using part of the budget for a small subwoofer. I have run one in my secondary home office rig for years and it allows me to have great performance at any volume but also the ability to run bookshelf speakers on stands, making the room feel larger not as cluttered, not having to worry about pulling larger towers out into the room to breathe, etc.
Looking for suggestions on speakers and an integrated amp for a second system.
I will be using these in a medium size room at lower volumes. I listen to female vocals and jazz. I like a softer sound and am open to tubes. I will be buying used and would like to keep the total budget under 3700.00.