If you're not sure about putting B-series stuff on, you could just go for some aftermarket slotted rotors in the AU size...
AU3 front:
http://www.ebay.com.au/itm/Brake-Rot...#ht_794wt_1037
AU3 rear:
http://www.ebay.com.au/itm/Brake-Rot...#ht_794wt_1037
I personally have these on my AU and can vouch that they are a good step up from the stock rotors. Especially when paired up with quality brake pads, such as the QFM HP-X.