There isn't any PMP that is "good for electronic music". A good PMP is about sound quality, build quality and user interface. I suggest using a neutral PMP without any significant roll-off. My favourite portable rig was my Sony X1050 with my Arrow 12HE. The X1050 has a solid interface, amazing build quality, a beautiful screen and offers a lot of SQ tweaks. It also has the exact same form factor as the Arrow making it an awesome looking combo. It has a slightly warmer signature than my Cowon X5L. This difference is absolutely minimal though. In the end, I sold my expensive X1050 and have been using the (Rockboxed) Clip+ ever since. No regrets and I don't feel like I took a step back in SQ.
I would avoid players like the S:Flo2, Hifiman, Colorfly, Cube, Nationite etc. They sound good (but not significantly better, differences are wildly exaggerated) but I'm not so sure about their UI and build quality. Like I said, a good DAP/PMP needs to be able to take a beating, be easy to use and sound linear/neutral. Forget about the genre and focus on which one would feel right in your pocket. :)