At the NY Audio show recently, a few rooms had very high end class D amps that were superb. Other than a no-limit budget and ability to use a crane to move class A amps, my experience has been where top class D amps are just as good as some very expensive class a/b amps i have used.
they also work better if you want to go "digital" straight from DAC to amp with passive pre-amp
they also work better if you want to go "digital" straight from DAC to amp with passive pre-amp