I owned Dominus speaker cables for about 3 1/2 years; prior to an upgrade from Collosus and then Proteus. This was speaker cable only, mind you, but the improvements were not small, and well worth it. Fortunately, I was able to take advantage of a trade-up program Jim Aud offered ( I don't believe this is still available), making it financially plausible.
Recently, I swapped nearly all my cabling for FIMs. They are definitely worth evaluating IN your system. Many outstanding products out there. It's a matter of accessibility for trial and favorite flavor.