It depends what you are looking for to achieve in your set up. If a live feeling of the performance, the illusion of being there and the musicians playing in your room, rather the obvious just reproduction of preserved sound from what ever source, then a there might be just a small step that makes all the difference. Obviously if you are looking for a rating increase in percentages, then go buy one of these advertising hifi magazines and you'll get the difference in black and white numbers .
the step from "reproduction-like" to "in-your-room-like" is HUGE, not simply a small step, and i think it cannot be achieved by hardwiring alone.
actually, hardwiring is the last thing to do after you have chosen the right DAC,AMP and cables...those can truly let you make that step, hardwire is just refinement. whats the point of hardwiring if you have a 200$ dac/amp for your hd800
still, nobody told me what's improved...detail?clarity?dynamics? what?