Bookshelf speaker recommendations

I have a pair of Paradigm Premiere 200B speakers—made in Canada—in my second system that I think do an excellent job.  I am driving them with a Rega Brio Mk7 integrated amp of 50 watts per channel.

CSS Criton 1TD-x

If you are into DIY I would give the Criton's a go. A little bass heavy with a soft dome tweeter is right up my alley though. 

Other than that I would be hittin' up my local Marketplace. Where I live most speakers sell for much cheaper than what I would normally consider a good deal on the regular second hand audio markets. But legitimate good speakers don't pop up everyday in my area. I grabbed some Sourcepoint 8's a few weeks ago for a grand. I think they were worth it. I've also grabbed the older Jamo's, Mourdant Short, PSB speakers for well under a grand. With good equipment, & maybe replacing an electrolytic, or a dome tweeter, well designed speakers still sound good in 2026. 

Other than that you have received good advice from the other comments left. I personally like the idea of the CSS speakers. 

Yes the CSS sound like much higher end Dynaudios with better bass IMO. Driver and crossover quality is very high. I also happen to have some factory built 2TDX for sale right in your price range. 
 

if you want to keep that Luxman however you might want to look for something more efficient. I do play them with a Simaudio I-5 and it pushes them without much effort.