I did a brief write up two weeks ago concerning my experience with Rush pipes Titled “Not another Drone thread”
Build quality, fitment, and sound are all excellent IMHO but you will definitely need Torque Loopz.
I like the sound my 2 1/2 baffles make, but seems others think it's a little to loud for a Goldwing. It's not Harley loud but we didn't buy Harleys. If you are looking for a little rumble I would suggest the 2 1/4 or 2 inch baffles. Hope this helps. Jeff