Bookshelf/subwoofer combo

Given what you’re looking for and budget, I’d pair Joseph Audio Prisms, ProAc Response D2s, Revival Atalante 5s, or Fritz Carbons with a pair of Rythmik F12 subs.  All would be sublime IMHO and pretty sure you’d be thrilled with any of them, but I believe Fritz (and Rythmik) is the only one where you get a return option if they don’t work out for some reason.  Just my $0.02 FWIW, and best of luck in your search. 

Fritz.  In modesty well damped room the Revelator based models have amazing bass

I have the KEF Reference 1 Metas with a pair of subs. Worth a listen. 

Any power sound audio sub that tickles your fancy.

I haven't heard Studio Electric speakers but they receive many laudations.

Sold direct to consumer ... I believe, with a 30-day trial period.

Give them a look!!

https://www.studio-electric.com/FS1%20Loudspeaker.html