The 2006 BMW Z4 Coupe is being reviewed by various outlets, with some comparing it to other vehicles such as the Porsche Cayman S. The Z4 M Coupe is also being discussed, with one outlet suggesting it may be a better buy than an M3. Reviews and buying guides for the 2006 BMW Z4 Coupe and Z4 M Coupe are being published by multiple car magazines and websites.