I never "upgrade" to aluminum parts because aluminum bends and does not bend back. I would rather break an A-Arm than spend an arm and a leg on one that is going to bend in the same kind of crash. Since this is a 3.3, if it does not have steel driveshafts, then that is definitely a great purchase.
As for the A-Arms, RPM makes some great ones. Stronger than stock, but will still bend slightly before breaking, but when they bend, they spring back.