used power amp under 1500

@reme wrote

I used a 5 channel Sunfire Cinema Grand Signature series (425 wpc high current) amp. I bi-amp them with excellent results.

Keep in mind though, that's 425 Carver watts per channel. And a Carver watt is worth approximately 0.265 Classé watt.

The good news? One Carver watt is worth 1.1 NAD watt.

Schiit Wotan at $2k new. I sold mine for $1600 and the buyer loves it. This amp can drive almost anything. I had 2 CODA amps and the Wotan amp but only needed 2. The Wotan was also the easiest to sell.

When considering an amp option such as a Carver it would more about the high current rather than the wattage. I think they have worked well for me over the years because I am a big proponent of biamping speakers whenever possible.

I have a pair of Odyssey Khartago monoblocks that were upgraded to the top option a couple years ago. I’ve since replaced them so these great sounding amps are just sitting around. Let me know if you are curious, I can fill you in on Odyssey, Klaus the owner, and his gear. I’m still running his phono pre and tube preamp. 

If you are set on sticking with your current speakers the nudge in the direction of current is a really good direction to look in.  An amp having grip, control over speakers is as much about current as Watts.  If you could find something like a Coda 11, that’s an amp that is in a different league than most of the recommendations.  Some other recommendations for new or slightly used, Parasound A21 used, Paech Tree Audio (Class D).  Of the recommendations already provided, Music Fidelity is really had to beat, especially used and if you snagged one of their integrated amps, M6, likely an overall upgrade to your Pre as well.  Schitt from a dollars to performance ratio is about a good as it gets.  Rogue is a great company.  If you go with a Schitt their gear already offers such great value there isn’t a big discount used, new is the way to go, used though can allow you to jump into another class of product like the Coda.  Good Luck.