In that VWROC post the black R estate with Performance Pack lip is mine.
For the money you cant go wrong with them, & for me because the R estate in performance pack spec didn't include a rear lip spoiler like the hatches did/do its even better.
I'm actually thinking of changing it to a TCR shape one which has a little more kick to it over the PP, but still retains a nice subtle stealth look.
Just to say, be aware that the hatch top on the 3/5 door GTi/TCR/R/GTD/R-Line is actually deeper & has a different curve to the standard Golf & estates, so be aware when buying to choose the correct version for your car.