When you look at what is happening in the domestic market, it makes me question where BMW M is going to go, performance wise. US manufacturers are pushing large displacement, forced induction cars that are highly performant for a relatively low price tag.
Look at the Camaro ZL1, Corvette Z06, and Mustang GT350/GT350R. The US manufacturers have stepped up their game, and (with the exception of Dodge) are now making cars that can go fast in both a straight line, and a turn.
Hell, you can get a 680 horsepower Roush supercharged Mustang GT with full warranty for under $40k, or 727 horsepower with a parts only warranty for the same price.
Don't get me wrong, I love my M, but they need a more hardcore model at a competitive price point (like an S63 in an M2 GTS for ~$80k).