lex76,
What choices of brake kits do you have in Italy? What wheels are you using? If you want a brake kit that fits inside the stock 17" S-spokes without spacers, then you're left with waiting for the
JCW kit (no info yet), or the more affordable UUC (releasing soon). It's not really worthwhile to order brakes from overseas because shipping will cost you a lot, unless you can find a very good deal.
In general, you don't really need to upgrade the rears, because the fronts do most of the braking work, unless you have a superstiff front suspension setting
If you insist, upgrading the rear brake pads will probably do the job.
Paul, I'm sure the Tar-Ox 10-pot is good. I just find it annoying that the ABS kicks in so early (as if I'm braking on wet surface), maybe R-tyres would help
Never tried this combo. Might be a good idea to tweak the ABS setting, if possible. I suspect the brake bias for this one might be too much on the fronts!? Have you ever compared the braking distance using this kit against others using other brake kits, or stock setup, side by side, everything else being equal?