All - I have a pair of 16ohm single driver speakers (92/watt), and I'm looking for your favorite low-power 15-40 watt) receivers from the '70s. Speaker manufacturer suggests damping factor around 40. I want a GREAT tuner section and an overall engaging sound. Some ideas I have are: Sansui 771, 5000A/X, 1000A (tube); Pioneer SX636/838, HK X30, Sony earlier models... Are there any "under the radar" that can be had for $400 or less? What are your thoughts? Looking forward to your replies.