used power amp under 1500

The PS Audio S300 is super and can be had for about $1000. Can't go wrong with that. 

I would lean towards a well made super amp that’s a bit older.   Mark Levinson, Rowland, krell, classe, Bryson, pass labs, etc all made 100 wpc stereo amps that if you’re lucky come in under 2k.  
 

im running a vintage pair of levinson 20.5 mono blocks that had been lightly used.  They sing like the 25k amps they are.  Cost me 2250.

anyway good luck. 

A friend in my audio get together circle was looking for a new amp and settled on this company.https://www.buckeyeamp.com/shop/amplifiers/hypex/ncore

I heard these amps and was very, very impressed. He does his homework and stated the customer service is great. Well within your budget. I think he bought the mono amps.

@2psyop yes, Buckeye looks too good to be true. Seriously. I will call them tomorrow. Are they Class D?

@dickieboy the PS Audio is a great option. In my top 3.

@msheldonsb I am always leaning to buy vintage. In this case it’s a bit risky. There is no return option. However I would take the dive for a Classe or Bryston amp.

@jimmyblues1959 84dB. I think I would need more than 55 Watts. I do love AVA though.

@yyzsantabarbara Yes Schiit looks good on paper. I have no experience with it. But the price/value is compelling!

I did not read fully through all the posts but but maybe give a look at Emotiva gear. I purchased their BASX A2 power amp. 160wpc into 8ohms and 250 into 4. Made in USA and about at about half of your budget. I know Emotiva doesn't get much respect here but I have had mine for several years with flawless service.