Well Klaus has been doing pretty well with the dc pumps for years with the red dragons. Advantages mostly low heat, quiet, reliable, low power draw, high effiency
I really see the value in having controllable dc pump for return and circulation pumps, as you can say run wide open when its daytime and dial it down for quietness at night etc. My sicci for my bubble master is getting replaced by the waveline 5000 dc pump , im hoping since its dc i can use the reef angel to really fine tune my skimmer, i love my skimmer but sometimes its finiky about adjustments.
since its dc it wont have the option to spin backwards and make me reach in and manually start the meshwheel spinning...