I use muffs.

I was told my ported .44mag was going to be extremely loud, so I used both ear plugs and muffs the 1st time I shot it and it was no louder than any other gun I normally shoot.

I'd say just a pair of quality muffs is plenty of protection, no need for both, in general I would say muffs are better than ear plugs which can come loose at times etc...

I'm very protective of my ears too.
remember sharp ultra loud noises can damage just as much as loud noises for exposed periods of time, ie the lawn mower....loud music etc...