Hey,
I'm listening to a Techno mix right now on my DT1350s. I'm in love. Only had them for a couple weeks, and I'm using them more than my HE400s now. IMO they are much more suited to EDM than any of the other Tesla cans - I owned the T70s for a while and they are very bass-light, and by all reports so are the T90 and most others.
Yes 1350 may be on-ear, but once you get the right seal/fit they are GLORIOUS. Bottomless bass. Sub... wow
Plus, they're probably THE best portable (non-IEM) headphone out there. Built like a tank, light, stylish and easily powered (sound great out of iPhone) - they also double as great DJ headphones too of course if you do that.
My workmate has the DT770s, and while they are comfy, and have good bass, they don't have the detail/definition of the newer drivers.
Even he commented that the DT1350s sounded way better than his DT770s or his PSB M4U2s, and that was only listening to 1-2 songs.
Hope that helps
Obviously it would be ideal if you could audition them, but you could always sell them if they're really not that comfy. I'm getting used to them now and can wear them for longer each time it seems. Also, there are some larger diameter pads you can order from Beyer which are reportedly comfier and just as good for isolation/bass. There are some impressions in the DT1350 thread. I might get some to try them out.