I'm not an audio guru, pero makiki-sawsaw lang. Sa akin, ang maganda lang sa Marantz 'yung '60s to '70s US-made, solid state or valve. Yung mga Marantz Japan at Marantz/Philips, hindi maayos ang review, mababa ang re-sale value. PM-54 (Japan) should be 50 to 70wpc RMS, pero kung maganda naman ang tunog, type mo, and you think the price is reasonable, okey na yan. Sa newer (Japan) models nila, ang maayos sa integrated amp yung PM-94 and PM-84, dubbed Quarter-A series, kasi automatic A-class ang takbo niya basta 25% lang ng RMS rating ang gamit mo, at malakas sila. On normal listening, basta walang true bass - such as acoustic or electronic organ low, we use no more than 10 wpc continuous even with low-efficiency speakers. Reproducing good clean bass requires at least 100wpc even with high efficiency speakers. Dyan magaling ang toroidal transformer design. Kung PM-74 yang nakita mo, puwede dahil 120wpc RMS ang rating nyan. Warehouse surplus price ng PM-74 dito sa Davao - P3.5K, as is (available two weeks ago). Sa mga surplus shops dito, PM-74 in good condition, P5K.