Stringreen
I agree... they do change the sound. Even how they are positioned (platforms, spikes, pods, MDF, etc) CHANGES THINGS TOO.
Ever try a Running springs Audio unit? the Haley I got a while back sure has allowed far greater dynamics to flow thrugh. Progbably has a lot to do with the price tags. Two other friends say the Jacko, or the next step up is even far better.