Terribly sorry, i normally stay in the 'Other Marques' section of the forum.
In fact, next time you ask a question about your golf, i wont be so helpful. With regards to the weight loss, yes, you will gain additional speed & adjustability, but without the correct suspension setup, you will lose speed as the springs/dampers of your H&R's will have been developed with a standard weight in mind. I've done the stripped thing btw:
As it happens, Budgie helped me build it, along with Nick172cup and a few others.
On the flipside however, i did considerably more trackdays (10 i think) in my more standard, non-stripped Trophy and had equal to, if not more fun. I spent a lot of time on track, whilst others were stripping the paint behind that thing in the boot next to the other thing off to save 0.5kgs. Utter waste of time. My H&R's (when they replaced the Sachs) also worked incredibly well as the weight of the car (& distribution) wasnt that much different to standard.
So yeah, take the light hearted banter from those that have been there, done that & got the t-shirt over the past 10 years in clio's as perhaps some decent advice. We've all seen 1 billion 'track builds' on here, and rather amusingly, its the standard(ish) cars that not only get the most use on track, but rather amusingly, they're normally the ones lapping everything whilst being driven by experienced old farts that spend their money on tuition/track days rather than spaffy shiny things to save a millionth of a kg.