Dubman …used is always a bit of a risk with speakers. Not owned them, but the QAcoustics passive bookshelfs get amazing reviews, apparently sound amazing and the walnut ones look like much more expensive speakers than they are… in your budget too. I think Richer Sounds carry them if you have one anywhere near you.
mjh …massively depends on your budget, but if you aren’t arsed about them being ‘studio’ speakers, I’d give the active KEFs a listen, and I’d be tempted to give the Klipsch ‘The Sevens/Nines’ a go, solid reviews and look amazing IMO