Is this for a street driven GT-R or will you be doing track as well?
DBA luckily supplies the rotor to suit the OEM hats, so you don't need to replace the entire thing. However some people prefer to replace the lot
2x DBA52320BLKS (fully assembled, 2-piece, cross drilled/slotted, black hats) $1160
2x DBA52320BLKS (fully assembled, 2-piece, cross drilled/slotted, gold hats) $1160
2x DBA52320.1XS (rotor only, new nuts, cross drilled/slotted) $720
2x DBA52320.1S (rotor only, new nuts, slotted) $710
Pads for street use I would go Elig Sports($449), for mainly track some street I would go Elig Racing ($584)
Hope that helps
Freight should be about $35 for the lot.