Integrated amp suggestions.

If you can get a great deal and like the sound why no go for it.
Pass would be another brand to consider put if you can't compare go with the sound you like.

dan d was krell’s main man before his current outfit bearing his name

i have not heard his current super duper expensive stuff at any length but if it still has the same sonic signature as krell then it would be classic clean sharp bass slammy solid state... can be lean and sizzly if matched poorly to source and transducer

ayre’s house sound is somewhat different, a little warmer, sweeter, a little less bass slam a little more air and subtlety

also suggest hegel and belles - excellent sounding units, very good spatial capabilities

The Ayre integrated—AX5-Twenty—is the best I’ve heard with many different speakers. I ended up with the VX-5 Twenty and kept my tube preamp but that integrated sounded so special with my Audio Physic speakers. 

In that price range I'd also look at the Vinni Rossi L2ise integrated, give you a 300B tube based preamp and excellent ss amp section. Just got mine and loving it. The Agostino stuff is excellent when I have heard it at shows, but the Rossi has heart and soul, slam, and detail without any edginess

@3952rsalmax
you are on the right track.
D'Agostino progression.good performance and has a brand cache as well compared to all other brands/models mentioned