Every car I've seen on 18s was Bridgestone.
Drove a gtd demo on 19s with pirelli p zero.
Drove another on 18s with Bridgestone tyres.
then drove a gti on 19s with Dunlop sp sportmaxx.
My g/f has Bridgestones on her 120d M-Sport and in the cold and damp they are pathetic until you can get some warmth into them. Problem is on a rwd car getting warmth into the rear tyres is relatively easy... the fronts are another matter. Setting off from cold you go from rampant wheel spin (actually frantic flashing of the traction control light on the dash) even at low throttle openings which switches to terrible understeer once the rears are warm...
If my GTD is to come with Bridgestones then I hope they are better suited to it than they are to the BMW 1er...
I run N-rated Continentals on my 911 and they are fine, wet or dry... I can't justify the extra £300 per set for the Michelins which are supposed to be the best on the 911... maybe next time I need a full set, I'll make that investment now the old girl will be doing fewer miles with the arrival of the GTD...