Fostex TH/TR series, absolute favorite for electronic. Classic V profile, similar in ways to DT990 but a little more fun than analytical, and more bass.
They are slightly less bright than those DT990s, but they have a smoother transition to bass and more amplitude down low.
My favorite is the TH900, many find it too bright to taste, but if you tolerate DT990s you will be just fine. The MD TR versions are excellent as well, and the different wood varieties tune the profile a bit.