@borat-sagdiyev - Well, to ME it was 'greatly' - can't swear it will be for you! To me, what it mostly improved was the '3-D, holographic' aspects of the sound, especially through Utopia headphones. I don't need the utmost detail; that's why I like tube or tube-y sounding amps, like Lyr 3 and QS.
And if you love the Lyr 3 as much as you do, I hope at some point you'll at least give a try to some other amps. Lyr 3 is a fine amp and a fine value, but it's just the beginning of a whole world of amplification out there that would REALLY blow your mind (and hopefully not your wallet!).
Good luck with your tube experimentation!