nice bar.
have a look at some of the whiteline kit that are on offer.there are different combos that can be purchased in regards to front and rear swaybars.adj or fixed-22mm-27mm thick solid.i think they may even go thicker.not sure though.
is that bar you have a solid and not hollow?
mine is 24mm front adj and 22mm rear adj.if i remember correctly.they have made a big difference to the way that the car handles.and having adjustabilty there makes that much more difference when you are looking at getting different reactions from the cars handelling performance.also adding camber to the front helps allot for handelling.but wears the tyres out unevenly.