At a $1500 budget, your choices are very limited. You may want to keep your present speakers and add a high end self powered subwoofer with a crossover point set at the low frequencies that you are missing, perhaps 100 or 80 Hertz. Also add an L-pad to control the volume of the subwoofer to keep it at the same level as the other speakers. You will also need a three resistor circuit to convert stereo from the two channels into one mono circuit just for the subwoofer. Let me know if you are interested in this gadget. Or you can check out the Klipsch website and go to their forum. Ask about the "mini box" that Paul Klipsch designed for this purpose.
You will have to spend from $10,000 to $20,000 if you want a quality horn speaker system with a high end amp and source that will avoid the harsh sound you don't want; and that's just for used equipment. Good luck!
You will have to spend from $10,000 to $20,000 if you want a quality horn speaker system with a high end amp and source that will avoid the harsh sound you don't want; and that's just for used equipment. Good luck!