IMO, the "best" oil is about specs. There's a general agreement, even among the OE specs, that the JASO-FD and ISO-L-EGD are the two specs which assure very good performance and cleanliness in two-strokes. As long as you use a product meeting/exceeding those specs, you should be fine.
My personal choice are the Mystik products, only because they seem to have the best pricing when bought in larger volumes (quart or gallon). They have several products that meet those specs and are licensed. See their website for the Sea and Snow JT4, and OPE "lawn and garden" products.