I think it's the only way to go. I bought wagenswest west ones, but didn't like that they were welded, so i had some made from a single piece of inch steel. a lot of places out here offer lowering services and just adjust the springplate, the negative camber is horrendous and looks sh**e, in my opinion. I've no idea what it must be doing to the bearings.
Depends how low for the best option. For most I cant really see any problems with a one spline adjustment ... there shouldnt be any additional bearing load?