25% is very good deal and the effective price is a steal for 2 channels power amplifier with 150w/channels power rating. I have moved with Marantz MM7025 with very good deal as it was the best matched power amplifier for my Marantz NR1608. But PA makes a lot difference in sound quality if match properly. Now entire frequency band has been lifted to next level on performance scale. Still I have not calibrated, just plug and play.