edit: now EVEN CHEAPER, £59.99 instead of £79.99!! Only a handful left in the stores though..
I realise this might be frowned upon by many, but a handful might find it useful.
My Sony centre speaker has developed a fault so I went looking for a replacement. RS still have the Dali IKON VOKAL 1 in stock in some stores for £59.99, which seems like a very good price. There are very few reviews around unfortunately, but for me at least this seems to be a very good centre speaker.
Official page: http://www.dali.dk/display_content.php/UK/speakers.html/215/1383
(queue "unknown brand, steer clear!" comments ;-) )