I know the main pan to have is Aluminum,but reading up about them has me a bit confused.
Now I've heard about the so called health issues,but I'm also hearing alot about how it can change the taste of your cooked food by causing oxidation.
What does oxidated food taste of...metal?
I suspect that the oxidisation affects the pan rather than the food ! Aluminium does oxidise quite easily, so (for example) one is advised not to cook acidic fruit such as rhubarb in one, but I have never heard of anyone avoiding cooking a curry in one (until I read Loveitspicy's comment, below !). The aluminium oxide can be taken up by the food, but the chances of your being able to taste it in a curry are about as great as a snowball has of growing by accretion in Hell !
I made a madras tonight with my new aluminum pan,and for the first time ever i thought i could taste..metal throughout the curry?
Well-documented psychological effect : you expected it, so it seemed to happen. Within a few days you'll have forgotten all about it, and your curries will taste as good as, if not better than, ever

What pan should i be using?
For myself, I use only non-sticks pans : aluminium for the halogen hob, stainless for the induction hob. And I cook my rhubarb in a huge, French, cast-iron pan.
** Phil.