What are the best omega 3 supplements with dha and epa?

what are the best omega 3 supplements with dha and epa? Among these, what companies refine their's the most for heavy metals and stuff like that? Price doesn't matter.|||There is one brand that is exclusive to physicians: PRN (Physician Recommended Nutriceuticals). The products are pharmaceutically licensed, NSF certified, and condition specific. Furthermore, they are recommended by some of the most prestigious physicians in the country.|||If price doesn't matter, I would recommend Dr.Mercola's krill oil. I am sure there are others that are comparable but I bet he oversees the production process. It's $63 + shipping for a 3 month supply.