Right heres the thing iv just bought the speakers and iv come across the amp on eBay but obviously cant try before I buy, so will they complement each other, and will it have the guts?
The 640A is quite warm and musical, if this is your taste then its a good choice and should work fine with the KEFs. However the quality of the source is always the key so make sure you pick something of a decent quality such as the CA 640C V2, should be able to get a second hand one by now.