handling upgrade sway bars/braces etc not suspension!

hey. cant seem to find any info really on handling upgrades for the cupra. all ready using the tried tested ebiach springs and very happy. now ive found plenty of upgraded anti roll bars the usual etc. but whats peoples opinions on the more chassis based bars. like ultra racing do mid chassis braces and they do loads of rear sway/stiffening bars for the rear. usual anti rolll bar but also others that bolt across the rear arms. and inbetween ARB



are they worth doing these been as the car all ready has ARB front and rear?

,my mk4 golf was transformed by ARB but that because it didnt have them at the rear and did make a big difference.

any help would be appreciated as want to order this weekend