After taking a peep at the innards of the Modwright, I can see why it could sound better than my 3A. I didn't find any pictures of the Rowland's innards. That huge transformer and the exclusion of electrolytic caps is a good indicator. Since there is not enough room inside my 3A for those "mods", I'll have to consider a Modwright.
Audible Illusions 3A or Modwright SWL9.0Signature?
These two pre-amps are too close to call. Both have received excellent reviews. However, from the aspect of dynamics, accuracy and especially MUSICALITY, which pre-amp might have the edge???.... Also, though it is almost twice as expensive as the above units, how does the Rowland's Concerto pre-amp rate?? There are hardly any reviews of the unit.