looking for advice on bookshelf speakers

I am a audiophile who suffers frequent headaches. I still try and listen to music daily . I am only able to listen for an hour at a time. My current speakers are Paradigm Studio Reference 40 v2's . The treble is the hardest part for my listening sessions. Can people tell me of a good monitor that has mild treble . Maybe laid back is a good term for what i am looking for.I will be buying used with a budget of say $1,000 to $1500. If you know of any, that would be a great help. Also maybe a certain integrated amp would have a more pleasing sound ? Thank you !