The best EQ would be Accudio app on iOS, with its parametric EQ.
Just an EQ which allows you to raise anything by 30 decibel (are you even reading this yourself? 30 = Thirty), doesnt make it good.
I cant imagine a situation where you would want +30 db on the bass... thats more than x6 times the amound of bass, compared what it should be.. This cant possibly sound right, if it doesnt distort completely after 10-15+ dB.
i would never use more than +- 5dB on any Equalizer. If you need more than 5, you have the completely wrong headphones, or a completely wrong mindset about what Music should sound like (no offense to you, i mean this generally).
When i think about those people who use headphones like beats (which already show you like 2-3 times of the bass, thats would be normally there in reality, so that every details are gone), and then again +20 dB per EQ... I honestly cant imagine, how you could bring audio quality any lower than this.Even a fart shoudl have a higher quality, than this scenario)
Anyway: a Parametric EQ, where you can chose the exact frequency you want to raise/lower (even if it goes only from -8 to +8 dB), is by MILES better than an EQ, which goes from -30 to +30 dB.
Speed: Well, i cant complain about my M8. Show me one single device, which is noticeably faster than this.
Btw: try google for "HTC W8", and you should find your perfect Phone :p
lol. I have akg k240's (favorites) and i keep them flat. I also am a basshead secondly, which a ton of people seem to forget exist. Believe it or not, there are cans that can eat 30db of 30hz boost and have no distortion. JVC SZ2000 etc. Even at 60% volume on an fiio e12.