I am looking for some headphones for arround £50 (willing to go up if I need too), which I will be using mainly for single player gaming, with some music (mainly bass and dance). I would be using it at home on my pc with fairly modern middle of the line integrated sound.  So far I have been...

Hi, I have £100 to get my computer audio sorted out. At the moment I use a £5 pair of headphones and integrated sound. Should I get £100 headphones? Or a card and headphones?