Having not long bought mine I can answer a few of these.
You can have them with different pads (Reyland have a few alternatives but I couldn't say what as they didn't have PFC and that's what I wanted) or with no pads (what I did).
@will300 has been running these longest and hasn't had any hose problems as far as I'm aware. They fitted on mine with no issues mounting as they should.
I've got J hook and not noticed any difference in noise. One of the big advantages of having the genuine AP discs was that they have curved internal veins. The downside is they're quite a bit more expensive. However, Reyland now offer this with their discs (it was an extra £50) when I bought mine and so seemed like a no brainer to me.
Definitely black with Ginger. Red would look odd imo