Yeah, for the DV64's.  Might be overkill, but actually made a nice difference from my limited amount of listening last night.  Seems to be quite a bit more dynamic, but I need more time getting everything setup and calibrated.
The EFE mods definitely made a positive difference.  The speaker seems warmer and more accurate and balanced.  2 channel listening is much more enjoyable to me after the mods.  I would highly recommend it.