I've had a remora pro for about a year and have no compaints EXCEPT the Rio pump. There were several times (early on) when I thought the pump had burned out, until I realized the pump will not restart if there's a loss of power. It needs to be disconnected (removing the skimmer box, clamp, etc.), turned upside down to drain the water, reconnected, and restarted.
ANY replacement has to be an improvement. IMO.
Bluto