Given what you are looking at doing, I'd go with name brand parts rather than cheap knock-offs.
On Miatas, you can get away with cheap blank rotors... many spec Miata racers do just that without problem, although you don't need much brake to stop a twelve-pound car.
I'm not sure how that'll translate to the 944 so I'll refrain from talking out of my arse.
But with drilled rotors, I wouldn't cheap out. Personally, considering how they are more failure-prone to begin with versus blanks, I'd spend the extra money to get something that was more likely done properly. That said, I wouldn't buy drilled rotors in the first place since I track the car but I do think they look great.
Regarding the brake hoses, again, I'd spend the extra money on the good ones. Since the steel braiding makes it harder to visually inspect the lines, I'd sleep better at night if I was comfortable that they were assembled properly.
Were it me (and it will be soon) I'd just buy blanks, quality pads/fluid and leave it at that. Maybe the brake lines, too, although I'm not in any rush to change those.
Just my $0.02, of course.
BB.