I detested my BBS wheels and changed them not long after buying my car. I also downsized from 20" to 18" to achieve a softer ride. I changed them to a Coventry Hortnet wheel which they claim is designet for a Jaguar.
http://www.1010tires.com/Wheels/Coventry/Hornet/Painted/Hyper+Silver
Where in Pembrokeshire John? I'm on the Brecon Beacons National Park