I could never fully respect a HIFONICS amp. I mean they serve their purpose and they seem to be a bang for the buck but I would rather go with a Alpine, Rockford Fosgate, JL Audio even Kicker over a HIFONICS.
I was planning my new build with a hifonics amp to start. Got on here and looked around ended up buying a used Sundown SAZ-2000D for $350 shipped. Picked up my amp yesterday and honestly couldn't be more happy!