I've always had good luck with Co-Operators.
Three Porsches with them over the years.
'00 Viper - Steel Grey (ROE smooth tubes, muffler delete)
'04 Subaru WRX wagon - The daily grind mobile
'97 540i - SOLD
'87 Porsche 930 (B&B exhaust, SC cams, Garrett hybrid turbo, adjustable boost control, Andial fuel enrichment - 400 h.p.) - SOLD