Brembo HC best by far. See soooo many people complain about grooved and drilled discs warping and cracking. Run HC's on my track car and they get a pounding regularly, and never had a problem.
I've got pagid on mine with PBS pads and braking performance is stupid. I really don't think discs matter that much at all. I'd buy pagids again if I had to buy new discs, they came in about £20 cheaper than brembos too