hotchiks is good, I broke my during a nasty weight transfer, it was only 1" thick
I have the BIGGEST sway bar you can find, a 1.5" from BMR (its old but is 50% thicker then the hotchiks I had on before). I paid $150 for it. H&R is too expensive imho. If you can afford it sure go ahead its a great piece, but it is not the only piece nor the best for the money again imho. The H&R piece is really an advanced piece for track users, advanced in the sense that when you get it the adjustment capabilities of it will force you look at many other variables within your own car, such are pinon angle, weight, weight transfer, preload settings, and many more. All of those will have to hold hands if you want to maximize the potential of that H&R, that is to get your monies worth. Which more then the average person with a GN IS NOT ready or willing to do, at least on their own time and dime. But again if you have the money phuck it, but just remember your opening up more holes to crawl through. Weather its you or someone you pay.
best solution imho is the REPRODUCTION (EBAY) ATR bar
or if you can find it a BMR bar. Both of these are CHEAP SOLID PROVEN solutions