These last days I have been using my daughters headset, a superlux HD681.
I thought this headset was... well.... cheap... and it is... but... it's sounds is far from cheap.
In fact, I realized that I wasn't using my so beloved Sennheiser HD580 for several days, so this thing couldn't be bad at all !
Much better than what you expect from a 20-euro headset.
Considering it's price, this one is really, really good.
For more info, see
http://www.thomann.de/be/superlux_hd681.htmMoon