Dear Kjl: With the statement that your room is right on target do to the Echo Buster job, my advise is that you go for a pair of monitors : Revel, JmLabs Utopia, Merlin, Harbeth, Spendor, Legacy, Talon, Dynaudio, Dali, Totem, Proac, Tannoy, Thiel, B&W, etc... and a pair of subwoofers: Audio Physics, Talon, Velodyne, Revel, Aerial, Etc....
In this way you can get a 20K very high quality sound reproduction speaker system that is a " full range speaker system ", that can be competitive with speakers that cost 50-60K+ and with many advantages over that very high price speakers:
- Many of the monitors models in a speakers line manufacturer ( between their frecuency range ) sounds better than the full range system, but not only sounds better they have better imaging, focus, less distortion, etc,..
- You can integrate easily the monitors to your room than a full range speaker and you can find the best room place for the frecuency range of your monitors: high/midrange, where the monitors don't have to worried about the low bass.
- With a full range speakers ( in one box/body ) almost always the best room place for the best bass room interaction is not the best place for the high/midrange frecuencies room integration: there are to many compromising issues that degraded the quality sound reproduction. With the monitors/subs fashion you don't have it.
- In the same way you can integrate the two subwoofers easily in your room: these subs are " separate/stand alone " of the monitors. So you can have the best room integration from both worlds: monitors and subs, you can't do this with a molithic speakers.
- Now, you don't have to worried about your tube amp because your amp is now " free " of the great power demans of the low bass frecuencies that now are handle for a dedicated amplifiers on the self powered subwoofers.
Now you told us: " I would also like a speaker that does not require a sub. " : please read carefully to these links:
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1117893153&openflup&27&4#27
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1117893153&openflup&31&4#31
Btw, I really like your Discovery cartridge.
Regards and enjoy the music.
Raul.