M5 and 4S are comparable in price, the Turbo is quite a bit more. So if the M5 is beating the Turbo on the ring, then it seems to offer the best price-performance point in the market.
Of course the M5 won't hit our shores till April.
2014 BMW///M5 Individual
Frozen Grey, Silverstone Full Merino, Piano Black, Exec Pkg, Drivers assistance pkg, LED Package, Bang and Olufsen, 20" Forged wheels
2015 Jaguar F-Type R Coupe