£400 sounds like a good deal
I believe xStric9x has the 452/ZE912 set up and he is not impressed at all and in fact much prefers the grip and feel of 050 'Stones that have harder side walls. People knock the 'Stones and I found the 040's pretty useless in the wet, but very predictable in the dry whereas 452''s all round are superb in the wet. In fact on the Nismo wheels the Falkens give almost too much grip in the dry, for when you want too play The poor old clutch lets my nose know on that score