Hello Ladies, I am curious to know, what according to you is the best/safest material for cookware to use in cooking : stainless steel, aluminum, copper, non-stick, hard enamel or any other? I have heard some discouraging things about using non-stick & aluminum cookware for cooking. I had bought an aluminum pot from India which I loved dearly but tossed it upon reading that some studies have proved that Alzheimer's has been linked to aluminum. Most internet sites state that the studies are not conclusive but they sure are enough to scare me off! I am so tempted to buy all the Rachael Ray colorful cookware sets but they are mostly made of hard enamel or are non-stick, so confused on whether to buy those. I have been sticking to stainless steel only for peace of mind! So, pls share your thoughts. Also, experts pls suggest if there are any other features one should keep in mind while buying cookware. Thank you!