Sorry to echo what already has been said but I think monitor selection is a really personal issue. Until I listened to a number of monitors, I had no idea I preferred slightly softer hi-mid presentation and ended up going for a brand I hadn't considered before (Eve) ahead of more established suspects Adam/Genelec/Focal etc. I understand the issue of local availability but IMO it would be worthwhile a (day) trip to a decent shop with a good number of speakers to "audition".
As with anything, going second hand / b-stock is likely to allow you access to "better" speakers, whatever that means.... which may mean you can audition speakers up to around £400 new?
Red Dog Music in London were very good when I was picking monitors, good in-store choice and very patient.
EDIT: ...in addition to "best practice" suggestion above, I think Alesis M1 struck me as quite decent monitors within OP's price range...