I have lived with Heresys. As you mentioned, that tweeter will drill a hole in your brain.
You have a lot of good suggestions. But the bottom line is how the speaker performs in your room with your system. It is especially vital that your amp mates well. And really has a SQ that sound real to you.
I have been very impressed with the Fyne line. Those designers have taken the blueprint of Tannoy and taken it to a new level. And if you like horns, the Voti are a great choice and not as sharp as the Heresy.