I would like to quote someone who is into HT and the gears he used to own (from hometheatershack forum)
LOL! This thread sounded like it might be an interesting challenge to my memory so lets see.... in no particular order:
Martin Logan SL3
Snell E/III (x2, in both oak and black)
Snell A/IIi in Brazilian Fire Maple
Snell J/IV (bought, sold, bought them back they are so good!)
DIY Sachiko BLH with modded Fostex 206E
Yamaha NS690
ADS-L810
Cerwin Vega DX-9 (x2)
Cerwin Vega D9
Cerwin Vega "E" series (all of them)
Cerwin Vega "V" series (all of them)
Lots of smaller Cerwin Vega
Acoustic Research Teledyne AR9 (how I wish I still had these!)
Acoustic Research Teledyne AR9LS (good, but not as good as the original)
Acoustic Research Teledyne TSW910 (read one line above)
Polk SDA-1
Polk SDA-2 (all the SDA are special... you either love the sound or you don't)
Polk SDA SRS 3.1TL
Magnepan MG1
Magnepan MG2
Dahlquist DQ-20i (great speaker!)
Dahlquist DQ-30
Infinity Kappa 6.1v2
Infinity Kappa 8.1v2
Infinity WTLC
Infinity Primus 360 towers with full surround compliment
Vandersteen 2C (x2 smoking good speaker for the money!)
KLH Model 23
Large Advent
"New" Large Advent
Advent Prodigy
Advent Prodigy II towers
Pioneer CS99A
Pioneer CS88
Wharfedale Dovedale (only pair I have ever seen, in person or the internet)
Wharfedale E30
Too many Klipsch to mention.
A bunch more including a ton of cheaper Acoustic Research, Pioneer, Yamaha, Onkyo, Sony, etc... Some smaller Paradigm, lots of Boston including the remarkable Voyager, and too much Bose (and rare Bose clones!) to embarrass myself with here
Oh, my currents are DIY full range towers featuring the affordable Audio Nirvana AN8 drivers in either the AN suggested 2.8MKII bass reflex cabs or my one-off 6'6" tall Metronome Mass Loaded Quadratic Quarter-Wave Tubes (say that three times fast!) Really not an "evolution" of sorts... I just get bored easily. Life is short and variety is the spice of life!