I loved the Infinity Kappa 9's my friend had. I sold him my carver silver 7t's. But they blew me away - he now has 2 pairs of monoblocks cos he had 2 kappa 9's.
I like speakers that have high efficiency, and make everything sound good.
Vintage Altec's, old Klipschs, old EV's etc etc sound very good to me, and you can push em easily with 10watts per channel. In fact they work better with 10 watts of SET power than with anything else.
I also have a infinity copy I made - dayton 12" drivers, a jamo 5" and a emit r ribbon into a fisher st735 cabinet that seriously punches well above the sum of its components.
I tend to like speakers that put out a lot of good high freq. I can hear well into the 20Khz's (odd for a 45 yr old) and hence I almost need it to be there.
I also liked those beryllium tweeter ones, yamaha NS1000 and down.
HPM100,1500 etc etc also were cool.
Like those amt equipped ones too. ESS heils and its modern versions.
Cool.
Srinath.