Decent 5.1 surround sound speakers for TV/AV Receiver

[W1TAK]

I need to update my current speakers as the wife says they are ugly and don't go with the redecorated lounge, they are a pretty old set of Denons which have done a good service and sound quality has always been good, but I am OK to replace them to keep the peace. Having a look I have no idea which ones to go for, my budget for a set of 5 speakers and a subwoofer is up to 500 quid. I have an Onkyo AVR which doesn't need replacing so its just the speaker set. Has anyone got any recommendations including a good place to purchase from? They need to be fairly discreet (aka small) & black.

Many thanks!

[W1TAK]

Thanks for the replies I will check out those two systems. The Monitor Audio is bang on budget.