Man, you're way off the mark, and there's some old-fashioned fanboys in here who just won't let go of the past, they stick with classics that are not really classics, the Audio technica ATH-M50 is crap, it's OK, but nothing like they hype surrounding it, especially by todays standards. I've owned both the Shure 840 and the 440's and they both suck big time, stop believing the hype man, honestly. Forget V-Moda, they are junk, honestly, i've heard them all, and not just in a horses-for-courses type of way, my ears listen for good balance and accuracy of the overall frequency spectrum.
Just recently, after i have bought many pairs of headphones, i bought the Shure SRH550-DJ; you want a nice neutral headphone with excellent frequency balance and accurate bass and exceptional overall clarity, these are it, no joke, don't say you weren't told, they crush the others. Talk about accuracy, just give them 20 hours burn-in and you won't believe your ears, just make sure you amp them for even better sound, but they still sound good without amping which is a bonus.
If you want an alternative, which is also top-notch, the Ultrasone HFI-580, i'm not playing games here man, i have both of these because i kept upgrading my headphones inching ever closer to perfection, these two are as close as you'll get, believe me, not Sennheiser not Grado not nothing can match these two, they are the Bomb. I even done the A/B thing between them for one hour between the latest Beyer&Wilkins (so-called state-of-the-art) and the series II Monster Diamonds (Beats by Dre) and the Shure 550dj beat both of them, i even confirmed it with three friends, they all agreed, the clarity and accuracy of the Shure550 and the Ultrasone HFI580's simply Rocks! Hopefully you will take some good advice and save yourself the time and hassle and money, i've already made all the mistakes, so i have saved you the trouble. Message me if you wish to know more. Cheers.