A manual M3 is pretty difficult to launch, so the automatic 550i may jump the start.
However, I heard there are problems with the new F10 pulling to the right, and BMW doesn't seem able to solve them.....I recomend test drive F10 before any purchase.
11 Audi RS5 Misano Red
2016 Audi A6 3.0 TFSI
08 E92 M3 Jerez Black 6MT--sold
08 E92 335i 6MT traded in for M3