Sorry, should have said - yes, they're OZ SuperTurismo GTs, in 18".
Thanks for the kind comments, they're taking a little getting used to looks-wise. Handling wise, they're absolutely fantastic - the car sticks to the road so much better, and despite my fears, scarcely any affect on acceleration.
MikeP - lol, not really in my plans for cheap/transferable (with the emphasis on cheap [B)]) mods with a view to changing the car in the not too distant future.