To add my 2 cents here... I kinda agree that amp5 sound warmer and could be a tad muddy as compared to the balanced amp3. I for one could not stand muddiness once I've tasted clarity. Despite all the rave on Amp4 or Amp4s, after going back and forth between 3 and 4... I ended up with Amp3 as I couldn't hear significant improvement in the Amp4... and to get a converter for 4.4.... it's just a little too troublesome there.