You’re never going to get anything better than it was mastered at. Personally I think it’s hilarious what audiophiles will spend on something that does nothing extra at all.
<edit> I don’t mean to sound like a troll here, I’ve just seen a lot of crap devices over the years that do nothing but cost an arm a leg and a few pieces of genitalia. </edit>
<edit2> This type of data would be really useful for anyone that enjoys music, even those of us with moderate means. </edit2>