A new M3 is massive news, and anticipation is building to a likely reveal at either Geneva or Frankfurt motor shows. Meanwhile, the spy-shot-fuelled speculation continues regarding the twin- or triple-turbo straight-six heart, of around 3.3-litres, kicking out about 335kW and at least 500Nm, driving the rear wheels, obviously, via a seven-speed dual-clutch gearbox. Less weight, thanks to more exotic materials like carbon-fibre, should ensure the F30 version delivers sublime handling. And we can expect a 4-Series coupe-based M4 (pictured) as well. Drool.