Hey guys, So i have been on the audio quest for a while now. Went through a dozen pairs of headphones before coming to the Dt 1770 (selling my PSB m4u-1's and UE 6000's if anyone is interested). I am very satisfied with the 1770's, though just got them Wednesday and have not tried them for portability at this point. I have a 4 foot cable coming in from amazon today, so we will see how they work at the gym tomorrow. So next is source. I started buying CD's again about a year and a half ago, and am up to about 120. I burn those to flac files. I also use an LG v10 with power amp beta that does the 24 bit playback. I am thinking of getting a DAP. I am willing to spend up to $400, which is what the FIIO x5iii costs. I like that is is wireless and I can download spotify, or even user Power Amp (I believe), but I also like that the Plenue D has a 100 hour battery life. I have read through the forums to try and get comparisons, but there does not seem to be a ton. Bottom line is this: are any of these actually an upgrade to the V10? If so, is it worth spending more money for the x5iii over the Plenue D? Ultimately, I use EQ, and my biggest use will be at the gym playing mp3's and Flac files via a player, and spotify at the office, but I can do the latter from my computer if need be. Thanks for your help guys.