It's further away from you than Leatherhead, but if you want another option there is always TWG Automotive in Frimley (01276 22733). Will, the boss, is Ex-Sytner.
I always take my Z4C and E46 there and I know of 2 other forum members who use them (one has another Z4C, the other has an MC).
Thanks guys.. Unfortunately the Sytner car wasn't meant to be as they wouldn't provide a 2nd year warranty! Feel gutted but learnt allot in terms for what to look for when the right car comes along! Grey with Red Coupe or Black with Red Roadster are on the top of my list..