Dazzdax, you described some of what others are hearing, although some report the $15k Rowland 300 series may not have these drawbacks. Other amps using the ICEpower modules have tended to lacked life, dynamics, weight and immediacy in my experience. Some expensive loudspeakers acknowledged to have excellent dynamics and extended bass didn't sound at all that way at CES last month. I have omitted the names purposely so as to not sound overly critical and hope I have not offended anyone. I'm not familiar with your amp but imagine an ICEpower based amp might be a step backwards.
Brian
Brian