Not sure if anyone is interested, but I got what I thought was a pretty good deal on 4 new Goodyears (GSD3's I think they're called) from Elite Direct (they are in Rainham - www.elitedirect.com) this weekend, £493.26 including fitting etc.
So far they seem pretty good - quieter than the original's. I also have to thank my friend Neil for giving me a demo of how progressively the S4 'lets go' when circling roundabouts with the ESP turned off and the roads are damp...

I know I wouldn't have caught it.
Cheers Mark