Hurdy got a good price on these I understand.
If I was to upgrade brakes then I reckon there are 3 options depending on money/cost/availability....
1, Uprated Disks + Pads
2, R32 Brake Setup - better jumping to this option if you do a lot of track days etc
3, AP Racing Setup/Brembo Setup - or a.n.other 4 pot setup
Anything more that that would be an overkill.