Hart makes great cables and I will always recommend them. They're great quality and very well made but they're not going to change the sound. You change cables for aesthetics or for the convenience of their cable system (which I love) but they will not improve the sound unless your current cable is broken.
I have some expensive cables and I consider them more like jewelry, they look nice and all that but they don't change anything sound wise.
But did you make a post about it?