Personally the front end like the digital front end equally important for quality for it provides the music good or bad , if the quality is not real good it cannot be made up down stream.
"I'm a believer"
I’ve been around high end audio for a great number of years. I have had the opportunity to hear, at shows, at audiophile friends homes and at audio shops, a great number of high end speakers: old and new, from the low, to the ultra megabuck price ranges. I’ve heard very, very expensive speakers that didn’t sound so good to me, and then, I’ve heard vintage speakers or relatively affordable speakers that just knock my sock off. In all my personal experience in this great hobby of ours, IMHO, there is no other item in high end audio that fall under the "Rule of Diminishing Returns" like loudspeakers.