Soy milk.....

Ok Ladies,
My son has an intolerance to cow's milk, so I placed him on soy milk, which he loves. I have been doing a lot of research lately, and I am finding out that soy is actually really bad for all of us and especially for kids. What do you all think about this? Should I just buy him lactose free milk at the store? What are my options if he can't drink cow's milk or soy milk?
Thanks!!!!