^^LOL, I know exactly what you mean..
I had Tarox's and DS2500's on my Anni and if they weren't used in anger for a few days they'd squeal like a stuck pig! Oddly though the second set of pads never had the same problem.
^^^^
Exactly his point - 6-pot overkill for my use, but not for your use 
This is just my opinion and by no means gospel.
If I was being asked, I'd recommend a decent set of pads and GOOD, high spec. fresh fluid on an R32 set up will be more than enough for most and with a bit of sympathetic driving will stand up to the odd track day (i.e. don't go staying out for too long and cook them). I'd go grooved over drilled discs if those were on the agenda too - just don't get anything EBC, it's garbage.
Your set up RR is pretty much ideal for anyone wanting to spend a bit more to reduce weight and get more power/less fade. I think it's the best mid-range set up you can buy. Alcons are AP standard, but I've discovered hard to get a decent range of pads for. RS4's are a great buy and Hurdy's are very trick too.
The Porsche/ECS ones are just for show, I wouldn't touch them.
And finally the big boys. 360mm discs and big calipers are as you say wasted on most. Usually found on 2 types of cars - Credit card wonders that'll never see a day's work for fear of making dust, and track slags.
Those VWR ones are surely based on an AP set up?? for the money, they're bang on. The cheapest I could find AP 6-pots (albiet with only a 330mm disc) was £1900 on the open market. So for bigger discs and essentially the same calipers/pads made specifically for a MKV, then that's what I'd have been looking at.
Out of interest RR how do you find the noise on yours?
