The Acoustic Research AR9LSI are one of the finest speakers I've owned.
AR9LSI: Floor
12" cone woofer
10" cone woofer
8" cone midbass
1.5" dome midrange
.75" dome tweeter
Response: 28-32,000
Power: 15-400W
Imped: 4 Ohms
I've had them re-surrounded recently and they still sound as great as the day I bought them. They were manufactured by Teledyne in the 1980's. The next awe inspiring speaker that I've listened to is the Kef 107/2 with the cube equalizer. I believe these two speakers should be in the top ten and can hold their own.