Sep 06 Road & Track comparo favored the Cayman S over Z4 M Coupe on the track and off. BUT,,,,,noted the price difference even tho BMW had $1000 gas guzzler tax.
I'd definitely take the Cayman S, but in the ragtop version.
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Mike
04 Boxster S - Basalt/Savanna, 6sp, Carrera lites, hardtop
70 914-6 - Black over tan, original/stock
PCA since 1970