1280x960 is the best I can find so far - http://mazda.jbcarpages.com/RX8/Wallpapers/Paper1/1280.php. No idea if it's Mazdaspeed or not, but I'm guessing no.
Mazda doesn't make any particularly sporty cars today other than the Miata (also known as the MX-5), but it has made its fair share of enthusiast-pleasers throughout its history. Most have been ...