I have heard similar problems with people that I know that have coilovers (sleeved). They all had the GC's but still complained of the noise and that the spring would have play at full extension. The AGX's would be fine with the H&R sports ands will be a great ride with that combo. There will be no play with the spring/shock setup like there is with the coilovers. I'm not sure where a good place to order them from so someone else can probably help with that. I would just start searching the Internet to see what you find.