hey mate i brought a 32. pumped the boost up to 20 with standard internals, big injectors, cooler, exhaust, cam gears, power fc, and blew one of the turbos in one week!!! also cracked a piston at the same time. but its an old motor.... i freshened up my motor now with forged internals and single turbo setup etc. doesnt mean the motor will last, standard power and standard motor can break things but is really reliable,,,,,,, stronger internals and bigger power is exactly the same. if u abuse it cosistantly the same thing can happen. although with a new motor it "should" take it a little longer simply cause of its age.
as for the sound of forged motor, ye u can notice a slight difference (sometimes) not that dramatic though