Honestly I would stay away from Stainless Steel rockers unless they have a roller bearing or bronze bushing. They tend to gall as stainless is not a very good bearing surface.
For example these have bronze bushings.
If your engine is stock and don't plan any performance mods then new stock replacements are fine. If there is an engine noise it may not be the rockers, you could have a flat lifter, bent push rod, or something. More information about what your doing (i.e a new build or just fixing an issue with a stock motor) goes a long ways for folks helping you out, the more they know the better your answer will be.