I think the consensus is that there is not much to be gained over the stock forged. For an OEM wheel, the 19's are aesthetically pleasing and fairly lightweight.
...Although, consideration of a wheel swap may take center stage (becoming necessary for clearance) pending the final fitment test of the Brembo BBK on the car next week-ish.
2013 E92 M3 Individual
Sold: 2011 E92 M3 SSII | Sold: 2008 E92 M3 SSII | Into a Wall: 2008 E92 M3 SSII | Sold: 2007 E92 335i JB