Philips SHE3595. Plenty of bass, and the sound quality will probably surprise you (in a good way) for the $15 price.     AF180 and SD-2 will both be less similar to the RE-400 than the RE-600 is, so if you're not open to changing up the sound tuning a bit I probably wouldn't bother.  ...

  The Titan 1 is both brighter and bassier, resulting in a more v-shaped sound signature and more colored tone. RE-400 is a little mid-centric in comparison but is overall more neutral, as well as smoother and more forgiving through the upper midrange and treble. The Titan 1 tends to be clearer...

  Aurisonics Rockets are great for this but they're disappearing from the market. If you can find a used set around $200, that would be your best bet.   Both BAs and dynamics from other brands are rarely tuned to sound like HiFiMan IEMs, but I don't have anything against BAs generally...

  FLC8 was my thought as well but specifically for these three criteria it's hard to call it a DN-2000 upgrade. It can be a little more balanced than the DN-2000 which helps even out the soundstage, but then you also don't get the sub-bass of the DUNU.   Pretty much everything else I have in...

  EPH-100 from Yamaha if you're prioritizing bass quality (and overall sound quality) over sheer boost/bassiness.   If you just want the bass cranked up as high as possible, the Pump Audio Earphones do a good job. Next best thing would be a Beats Tour 2.0 or Velodyne vPulse.     Yamaha...

  In my experience custom earphone demos give you x% similarity to the real (custom-fit) thing (where x is different for every manufacturer/model), but still generally differ more than the what you can normally make up by tip rolling.   As far as I'm concerned JH Audio's answer is true in the...

  I haven't tried them myself but I asked someone familiar with the Alclair lineup and the Spire is supposedly a more stage-oriented sound with extra bass compared to the Reference and the new Studio4.   Demos, while not perfect, are probably the safest way to decide on a custom earphone TBH. 

  Yep, the Alclair Reference is by far the best match for the GR07 among the reasonably affordable custom IEMs I've tried. Clarity isn't its focus like it is with the B2, but it's no slouch when it comes down to it.   As for upgrades, unfortunately 1964 discontinued the V6-Stage so the next...

  Thanks, and good info! I did kind of assume that the Dash is as good as it currently gets, mostly due to Earin and the other alternatives being trashed even by mainstream media. Seems like there's a good dozen or so more "true wireless" sets in the pipeline besides the Samsung ones, most...

  Perhaps someday. Unfortunately I can't review everything that comes across my desk so it's probably tough for some companies to justify sending me something on the off chance I might cover it.      Awesome, glad you're enjoying the Rockets!   I personally really like the HD600, much...

Posted impressions of the Bragi Dash "true wireless" IEMs at http://theheadphonelist.com/bragi-dash-impressions-the-first-true-wireless-iem-offers-glimpses-of-the-future/      IEMs are always interesting but I don't always get my hands on stuff from the smaller/newer companies. I have a...

    Ultimately it depends on the exact sound signature one is after - for some listeners the Momentum In-Ear can surpass the other two. For me it does not - I think the relative scores say as much: http://theheadphonelist.com/headphone-list/

  The Shures are probably the weakest link here, their dry and somewhat more mid-forward sound with rolled-off treble is less similar to the Sennheisers. The EPH-100 is a warmer, bassier MA750 alternative as someone mentioned above. I think the two are about on-par, but the MA750 is again more...

      Replied at http://theheadphonelist.com/headphone_review/xiaomi-piston-3-in-ear-earphones-review/#comment-129677     I'd go MA750 personally, Momentum as a close second. The Momentum In-Ear is tuned more like the HD25 than the Momentum Over-Ear, being more v-shaped and less...

  I reviewed the Rockets for InnerFidelity here: http://www.innerfidelity.com/content/lovely-ride-aurisonics-rocket    It'll be a little while before I can re-post the review elsewhere. I like a lot though.