Please, whatever you do, don't go for the EBC Turbo Grooved discs. I had these on my Astra along with some Greenstuff pads and within 15k miles, the "dimples" had completely dissappeared(sp?). I sent them back to EBC and fitted the replacements they'd sent me and they did the same but with the added "bonus" of one of the discs cracking (I even had problems with EBC discs when I used to have my scooter about 6 years ago). I do alot of track days in my Astra so the brakes need to be up to the job. I'm now running with Red.dot drilled and grooved discs and Greenstuff pads and after about 60k miles and about 5 trackdays, they've still got loads of life left in them.
Maybe EBC have improved the quality of they're discs over the past few years but I have no faith in them anymore after receiving 2 pairs of faulty discs.
TBH, I'd splash out the extra cash and get a full Black Diamond setup (front and rear discs and pads).