These sizes are aggressive, but are definitely a possible fit on an E92 M3 with the appropriate suspension modifications. I would normally only sell sizing like this to clients who are comfortable with adjusting front and rear camber to fit the wheels.
I would typically use 2.5 or more degrees of negative camber in front, and the maximum negative camber in the rear (which should end up at about 2.3 degrees negative on a lowered car).
I would absolutely suggest using the 265/30/19 tire in front over the 255/35/19, as the 255 is tall and may rub through your wheel well. You should have no issues with the 265, provided you have the appropriate front camber. You will more than likely need camber plates in front to have the flexibility of adjustment necessary to make a setup like that fit.
If you want a more "bolt on" setup that requires less adjustment, try shooting for a 19x9.5 +22 and 19x11 +30. You can use the 265/295 front and rear tire combination, and the wheels will bolt on to a car with OE BMW suspension without modification or a need to adjust the camber.