New center wanted

[brianb]

I currently have this kef kht1505 setup http://www.whathifi....iew/kef-kht1505

I am looking at buying another single speaker (and use my current center) and a new center in order to go 7.1 but I'm after a bit of advice on what to go for

I have seen a few B&W cc6's on eBay which I quite fancy however I'm not sure if they would compliment each other

Any advice would be gratefull