My own view is that the use of Audyssey or similar is absolutely imperative for room related issues in the bass region. The cost/benefit analysis higher up in frequency, however, seems to be much more variable depending on the individual listener making the decision. So...
The Audyssey/SVS unit is designed to work with subwoofers while allowing a more "traditional" (unequalized) audiophile style main signal path. I use the Velodyne SMS-1 with subs in this fashion. The only interruption in my main path is a (benign sounding - to my ear) NHT active x-over unit. If you're willing to use a subwoofer based system, this may be a "have you cake and eat it, too" solution.
As always, YMMV.
Marty
The Audyssey/SVS unit is designed to work with subwoofers while allowing a more "traditional" (unequalized) audiophile style main signal path. I use the Velodyne SMS-1 with subs in this fashion. The only interruption in my main path is a (benign sounding - to my ear) NHT active x-over unit. If you're willing to use a subwoofer based system, this may be a "have you cake and eat it, too" solution.
As always, YMMV.
Marty