Well having been throught this myself....my 2 pence worth...
Brembo Pads...good pad, stopped well, didnt last to long, not to bad on dust imo.....
OMP Pads (Ebay) had these fitted, as a 2nd set to my disks, and they were ok, did a trackday @ Brands, and they were fine, it was the fluid that let me down in the end...for under 40 quid, good value for money, BUT they did score the disk badly, and really seemed to eat the disk too, think i managed about 8000 odd miles from them!!! not so bad for dust too, just wouldnt buy them again due to the damage they did to the disk.
Ferredo DS2500 What a pad, no troubles so far, expensive, but good from cold, good when hot, i REALLY put them through there paces at the Lyddon trackday (as some of you will remember)
smoke.....worth the money, will have to see how many miles i get from them...
Motil RBF600 fluid....Again awesome, a little bit more than normal fluid, but the last trackday i did, NO FADE at all, even after the most horrendus abuse i could give the car 100MPH down to 2nd gear and numerous other heavy breaking bends (Lyddon Hill) and this fluid NEVER let me down, really worthwhile if you do drive fast..
Brembo Groved discs....covered about 4000 miles now, and all is well, managed to get a new set of oe disks from ebay, and get them grooved myself, after heavy breaking and when there hot, ie 120 down to 30 they make a hell of a noise, but no judder and the car is still stopping well, with no fade, and i can do this all day long with no reduction in efficiency..not that i would that would just be silly...but you get what i mean.
So all in im now on Brembo groved disks, Motil RBF 600 fluid, and Ferredo DS2500 pads, i KNOW my car will stop no matter how hard i push it, and on track or road, i am realy happy with the performance and durability of the set up, would reccomend it to anyone who is looking to upgrade...this has taken me 22,000 miles to do this, so am hoping the newest set up is a little longer lasting, lets see if you do pay for what you get, or if it is worth fitting cheaper sets and just replacing slightly more often...
Now the question is, is it worth upgrading the break lines??? Anyone?
Hope this helps a bit, iv rambled on for ages so....my 2 pences worth..
Matt