Sorry to resurrect an old thread, but I don't see why the S6 is not a competitor to the M5.
http://www.caranddriver.com/reviews/...s6-test-review
C/D TEST RESULTS:
Zero to 60 mph: 3.7 sec
Zero to 100 mph: 9.2 sec
Zero to 130 mph: 16.1 sec
Rolling start, 5–60 mph: 4.9 sec
Top gear, 30–50 mph: 2.1 sec
Top gear, 50–70 mph: 2.6 sec
Standing ¼-mile: 12.1 sec @ 115 mph
Top speed (governor limited): 155 mph
Braking, 70–0 mph: 157 ft
Roadholding, 300-ft-dia skidpad: 0.87 g
http://www.caranddriver.com/comparis...omparison-test