Gobble, if you're talking about the ECS type Porsche conversion with Cayenne 6 pots, then they're not worth the metal they're made out of for a MKV. They're show pony brakes.
What do you actually want the brakes to do? If you're looking for fast road and 1, maybe 2 trackdays a year, stick with what you have and pad/fluid according to your temps.
More? A few of my track day mates run a solid/4 pot conversion as the next step up, yeah they fade after a while but you just session accordingly - it's hardly ruining their day. A grand and a good cooling solution will see you right.
Lastly Alcons/APs/VWR and other BBKs yeah you're looking at big money, but look at any of the VW Cup race cars and they're all running a set of brakes from these 3 manufacturers (albiet not the 330 AP kit you get for the Golf, the 360/6pot for the 'rocco.). Why? because they do not fail. With these come a fair bit of looking after too, I've rebuilt my discs twice already this year, mainly because I'm anal, they didn't actually need it... but they're not exactly fit and forget. You do however get a good return for them 2nd hand, it just hurts a bit up front!
I might know of some APs for sale at reasonable money, but they're pukka race brakes rather than a road kit, so will need the seals changing every 12 months or so.