There is a simple as to resolve your quandary. The 440 is not world-class, and the Ultrasone 580 is also lacking in refinement and has weaknesses in the frequency presentation. However, the unanimous consensus everywhere is that the Shure 840 sounds better than the 440, but both the 440 and 840 lack 'perceivable' real-world bass, but their is a savour, the Shure SRH 550 DJ, it has all the same beautiful qualities of the 840 but in addition adds superb perceivable quality bass presentation, problem solved. I will be getting rid of all my headphones and keeping only the Shure SRH550, i've done all the tests here over and over and i'm adamant.
Imagine a headphone which sounds clearly superior than the Audio Technica ATH-M50 (which i have) and also clearly better than the Ultrasone 580, but also has all the qualities of the Shure 840 yet without the weaknesses of the Shure 840, and yet is cheaper than all of them. Don't make me repeat myself, i've solved your problem for you, simply buy the Shure SRH550 DJ and you will not regret it, but also will have a headphone superior to nearly all others out there, and at that price it's a no-brainer ($119), quite simply a win-win for everyone if only they would take heed to what i am saying.
I use the Shure 550 with a desktop USB DAC AMP 24bit 96khz, plus when walking portable a FiiO E12, and each time i do the A/B thang with the other headphones on the same amps the Shure 550 wins every time.