You have a big room. You need a big room speaker. Most of the recommendations here are for medium sized rooms at best, or way over your #5K limit. I would definitely check out the new SVS Ultra evolution Pinnacles. With 4-8" woofers (2 high front and rear 2 low, front and rear) per cabinet, bass extension, dynamic range, 'speed' and control are assured. The d'Appolito mid-tweet-mid helps control vertical dispersion, a big help in large, high-ceiling rooms that helps soundstage and imaging. And nobody does value better than SVS - at $5000 per pair new, they are one of the great deals in audio.
I would also check around and see if you can find a pair of JBL 4349. These are not your father's shrieking, boomy JBLs. These are superbly executed, very high performance loudspeakers of exceptional sound and build quality. New, at $8250/pr, they are beyond you budget, but if you can locate a good used pair, you might be able to pull them into your range. At 91+dB sensitivity, the also need about half the power of most of their competition, but can handle just about any amp you're likely to try. The single 12" woofer has slam. Kick drum and bass are easily among the most accurately rendered I've heard in pitch definition and dynamics. The unique 2-way horn/tweeter has a nominal 90X40 degree pattern, again, helping control unwanted room reflections, and it simply doesn't ever honk or shriek. It's just there - clear and dynamic.