A side by side comparison of the suspension options. Avo (the rusty one) is 2.8 Kg, Protech is 1.6 Kg.
That's a 4.8 Kg saving overall! Although considerably more expensive than eating less pies, it was far easier and still gives me the personal weight saving option.
Together with the fact that the new ones are indeed, very shiny, I am happy with my decision to upgrade. 
Thanks go to Neil at KitCarDirect for getting them at a very good price. Yes, he also does calipers but at this point we won't go there (remember KISS)