Integrated under 1k (hopefully 500) for Wharfedale Dentons & Snell

Trying to upgrade my system to better match some of new (to me) speakers. Interested in comparing the pros and cons of going vintage vs new(er) and where diminishing returns kick in based on my environment. Not opposed to used and do not really need a DAC as I have a Schiit Mimby. Listening at mostly low levels in a small room to a huge array of music, but mostly chamber, vocal, ambient, neo-classical, and some modernish pop. After a LOT of research I’m tending towards a few options:

• Older/Cheaper (all between $150 and 350)

-NAD C740/C340/326BEE

-Rotel (like RA-02/931)

-new cheap Onkyo (9010 etc)

• Newer/Not cheaper

-Jolida JD301 ($500)

-Arcam A19 ($600)

-Marantz 6005 ($400)

-Rega Brio-R ($550)

• Big Stretch

-Hegel H80 ($900)

-Naim Nait 5i ($850)

-Krell 300i ($1100)

-Rogue Sphinx ($900)

-Moon 220i ($1000)

I know this seems so all over the map, just trying to decide what makes sense based on my speakers and listening preferences. Open to other thoughts as well. Thanks!