Wow, that's a bit of a mixed response!  Pretty much matches everything I've read though.  Different things seem to work for different people.

Does anybody know what the current profits are for mining Ethereum with RX 580's?  If so, what's the best way of going about this?

I've just seen on whattomine that Metaverse is the current most profitable RX 580, so that's another option, maybe using DodoPool.  Any advice on this would be welcome too, thanks!