Im a new PPL and i bought a sennheiser HME95.
It was a little over £150. It is light, comfortable and the sound quality is very good. It has an inline volume control where you can control the volume of the left and right ear piece independently. It has an aux input for an ipod or mobile phone (though im not sure if this is such a good idea!) and stereo or mono output.
The headset is cleverly designed to fold down to fit in the small case which is supplied.
I would recommend this headset. It will do me until i can afford a Bose anyway!