You're spoilt for choice at this price level at the moment!
Assuming you want to stick with floorstanders, you should audition Monitor Audio's Bronze B5 speakers - a cracking five-star option at £400 - but also a newer Acoustic Energy model: the Aegis Neo Three (£370), another recent five-star winner.
If you're looking for a more compact, stylish option, KEF's iQ5s (£400) are also worth a look. They're not as complete all-rounders as the MA or AE models, but are still a highly impressive floorstander that should be heard.