Ah think I'm with you now. The current rear valance is an MS Designs one but it's not part of the same kit that's on the rest of the car. Is that right?
I'd be inclined to leave the skirts on as they're the nicest part of that kit and God knows what marks wil be left on the paint after you remove them. The paint shouldn't be damaged but it may be hard enough to get the bonding off it.
Word of warning, the genuine VW/Votex front spoiler (that's the one that must be colourcoded) isn't cheap. It's similar looking to the Anni one but it doesn't have those 3 gaps in the centre. In my opinion it's much nicer. It's listed at 190 Euro. Here's a pic of it....
The plain black valance (it's not as deep as the one pictured above) shouldn't be anymore that 80 Euro but doesn't look near as good. The genuine colourcoded front Votex spoiler finishes the front of it off nicely, makes the car look lower at the front but still has plenty of ground clearance.
Not sure how accurate those prices are though cos it lists the rear roof spolier at 271 Euros and I got it from the main dealer for 180.
542 yoyo's for the genuine R32 front bumper...gulp!!!
The only thing is you'll know they'll fit properly. I helped fit an MS Designs front spoiler to a friends Golf couple of years back & it was a nightmare. Never again, wasn't a good fit at all.