Stockers are aluminum, and stronger than you may think.
The three hole variety is normally equally tough.
If you go to maximum drop, you will change the suspension geometry, as well as the ride height. That change in suspension geometry will be noticeable, as the ride will be a little on the less than desirable side, from a performance standpoint (entrance and exit on corners, etc.).
I installed a set of Soupy's adjustable lowering links on my wife's '08. Not only are they adjustable to minute increments, but the construction seems indestructible. The drop of one inch resulted in a nice look, and more secure footing at a stop. I feel very confident that the links will NOT go out of adjustment until if and when I decide to change the height.