Z3 MCOUPE -advice on brake pads and disc's

Hi guys

needing some advice on brake pads and discs for a 1999 Z3 MCoupe . Been to check out BMW dealer , Midas and chatted with PowerBrake .

was hoping i would get away with just a pad change , but after a look the disc's are looking sad .

SMG BMW dealer
front: disc R2162 (each)
pads R1262
rear: disc R1357 (each)
pads R779

Midas-Tonneson
front: disc R1350 (each) ATE
pads R633 ATE
rear: disc R1350 (each) ATE
pads R247

Power Brake -JHB
front: GT Kit disc's + GT3 pads - R 5745
rear : same set up - R 3858

my question is :
money is tight this year , but i need a fair valued deal . Is there a major difference in the performance of these parts from various sources ?

this car is for road use ......if sometimes a bit spirited . i have a track tool
for being silly in .

thoughts , comments , advice ?

thanks