Hi MC. This stout is all about the yeast, which has a strong peppery flavour. Use a different yeast and you'll have a great, but very different stout.
All your yeasts would be suitable for a straight version of this stout, but S04 would be my least favourite of the five. You may prefer this stout with normal yeast, but the Weiss yeast makes it what it is. A good idea would be to split the batch in two and ferment one with the Weiss yeast and the other with an ale yeast.
The hops - you can use any really, in the Weiss yeast version anyway. I found that the hops were not prominent because of the yeast and roast grain flavours. You could use Simcoe, which is a brilliant hop, but I would save it for a beer where it would show up more. Same with Amarillo. So use Summit or Willamette. Or both. But you probably only need bittering hops, if you use the Weiss yeast.
All your yeasts would be suitable for a straight version of this stout, but S04 would be my least favourite of the five. You may prefer this stout with normal yeast, but the Weiss yeast makes it what it is. A good idea would be to split the batch in two and ferment one with the Weiss yeast and the other with an ale yeast.
The hops - you can use any really, in the Weiss yeast version anyway. I found that the hops were not prominent because of the yeast and roast grain flavours. You could use Simcoe, which is a brilliant hop, but I would save it for a beer where it would show up more. Same with Amarillo. So use Summit or Willamette. Or both. But you probably only need bittering hops, if you use the Weiss yeast.