For a normal fast road user (like myself), the NQSBBK seems to be the better option as it's cheaper to services, offers superior braking performance over the 345mm OEM setup (which I currently run) and allows you to flash a nice Porsche logo under your front wheels (if you're a willy waving show-want-to-be kind like me!).
I've seen a set of calipers on eBay going for under £300, a quick refurb and some adaptors plus lines to bolt up to my GTI would be around £600 I think, but what sort of discs and pads are the most popular as I'll have to replace my current front discs (they're too thick)?