I love RPM on TRX applications. Anytime something on my Emaxx breaks it is replaced with an RPM part. RPM is Nylon, stock is plastic. Nylon has give, plastic for the most part doesn't. So RPM parts can take more abuse. They will still break, but in my experience last much longer when using vehicle as a basher.

As far as the sway goes, this will help your cornering. Ever turn really hard and notice one of your tire lift off the ground? Sway bar will prevent this.