Your Ed30 is modded and particularly fast, aren't there lots of moments when you'd benefit from having more seat support?
TBH, I haven't had any issues where I felt the seats weren't supportive enough.
....I totally accept your preferences of course, but don't understand "they are much more what the GTI is about". I suppose you mean that the original GTI Mk1's never had this kind of seat, but I could argue that there has always been an attempt to include a more physically supportive seat in the GTI version of the Golf.
I suppose my point is more related to my definition of the GTI that it is a car for all situations, i.e. I can one day go and hoon around a track or down a strip like santa pod, the next day collect the parents and take them for sunday lunch and next drive to work and pick people up for business.
I have driven a GTI with Recaro's in so have had chance to make an informed decision on these, as when I brought my first GTI the dealer had a choice of two on with and one without Recaro's, I choose the one without
Like cocopops said in an out and out sports car I completely get the need to have seats like the Recaro's.
But if your pleased with them that's all that inportant