My Rig:Playstation 3
Type of usage:General Purposes, from gaming to music and movie
File format:AAC, FLAC and sometimes MP3
Music genre:All, but more towards jazz and pop
Budget:500-600 (not necessary maximising it)
Headphone/ earphone type: Prefer circumaural
Other requirements (if any): Surround sound, perhaps?

Well, my main purpose is to use it on console. I think it is quite difficult to include mobile inside if I were to insist on surround 5.1 sound, unless I invest on a Stereo headphone with a Dolby processor. In anyway, I am fine with both stereo and surround sound, as long as I get to enjoy the gaming session.

Is there any amplifiers recommendation thread around?

Oh, just perfect. Thanks!