Depending on what your price range is... Innersounds ESL amp is a "match made in heaven" for Logan's, some of the best sound I EVER had was with this amp driving my ReQuests. Also, and in the same price range, the Spectron Musician II or Bel Canto digital amps will work magic with your ML-3s.
If you can step up a few notches, the Parasound HALO's will give you even more refinement and musicality. I'm using these to power my Prodigys with incredible results.
If you can step up a few notches, the Parasound HALO's will give you even more refinement and musicality. I'm using these to power my Prodigys with incredible results.