Have all of my system hooked into the Tacimas as mentioned above and also have a Clearer Audio Copper-Line Alpha hooked to my Onkyo amp, a Russ Andrews PowerMax Plus hooked to my PS3 and a Merlin Black Widow lead hooked to my TV. All of them are available on at least a 30 day home trial (60 days for Russ Andrews and Clearer Audio) so you can try before you commit to buying. Since installing, I ran a lot of tests, and kept these three leads as I noticed less on-screen noise when watching Blu-Rays / DVDs through the PS3 and a definite improvement in sound with music through my Onkyo. I had some more expensive leads, but the difference was either negligible or not enough to warrant the price (clearly an indicator of the limits in my system rather than the leads themselves) so these were sent back for a refund.
Is it worth the money? Obviously, yes for me, but only you can decide that for yourself, that's why they offer the no risk home trials.