Here in Australia the DBA slotted rotors cost is very close to importing Project Mu rotors from Japan, if I had the choice I would import Jap Rotors. Hope this is useful:
RDA grooved/dimpled + slotted is: F=7701G 324mm, R=7702G 300mm
RDA slotted: F=7701S 324mm, R=7702S 300mm
source: http://www.skylinesaustralia.com/forums/Rd...ro-t282829.html
DBA slotted 4000 series: Front: "DBA 4928" 324mm x 30mm Rear: "DBA 4929" 300mm x 22mm
source: http://www.dba.com.au/7000/index.asp
Project Mu (Nengun have them as well): http://www.greenline.jp/catalogue/bccatpar...at=Brake+Rotors
Nissan, Nismo, APP, Biot, Project Mu & Trust/Greddy: http://www.rhdjapan.com/home/search/search...rotor&go=Go!