Best Speaker for a reflective room ?

Could you get away with something nice on the ceiling? Honestly, a bad room will ruin a lot of things, and I think your nice gear is really wasted. The best suggestion I can think of is to get amplification with room correction, such as the Lyngdorf and then get speakers which suit your general tastes in sound and decor.

Take over an extra bedroom?

I would much rather have a small dedicated space that I can control than a big area I cannot. I have heard jaw dropping systems in the size of a large walk in closet… and the great thing is that component costs drop significantly in a small room. Effort and carful choices and you can have a world class system with that $30K or a ok mid-fi system in your big room.

Klipschorns with their directional horns and some DSP added will work!

Two layers of Cement Board for all walls and ceiling fixes this reflection problem in your room