Thanks for all your replies guys, I have come to a decision!
I've done something that's going to upset Roger I think and ordered a B44... My main reason for this is the guy I'm going to be going racing with has also ordered one so we can share spares and setups etc. Also my local club is all about the B44 as it's Craig Harris' home of Caldicot with his Atomic 44...
Hopefully this summer we are going to try and attend a few of the local clubs in the mid west region as the scene in Wales is no where near as big, Ledbury looks like they have a really good outdoor track thats not too far from Cardiff!
I'm not going to sell the ZX though, well I may split the KMC parts from it and get the SP upgrade and use the car as a spare. If anyone is interested in a KMC conversion drop me a PM, its completely unmarked as its only ever been used indoors.
Thanks guys!
Mike