A lower cost alternative to the Troy that could work:
I compared the Ground Zero model#501 to the Tripoint Apollo. The ground zero effect is subtle at best, better focus with more stable images in the soundfield, but didn't compare with Tripoints expansive soundstage and added body to the music. Tripoint was much more quiet and resolving. The much pricier Tripoint is what I call grounding on steroids and worth the price of admission.
I don't doubt the Tripoint is better. I know Miguel and he has been playing around with grounding schemes for a while. I don't doubt he is on to something with the Tripoint. However, not everyone can drop $8k on such a device. As Danmyers said you could do it a lot cheaper and get good results.
Then again there are people like Charles Hansen of Ayre who have a totally different view on grounding.