[Alphamega]

As the title says, If anyone could make a comparison between any of those headphones would be great, particularly interested in soundstage and bass levels, but everything else is of interest as well.
Thanks
 
The headphones are M-Audio Q40, Somic HD-MH463, Denon AH-D1100, Audio Technica ATH-M50, Onkyo ES-HF300, Philips Cityscape Uptown, Sennheiser HD-558, HD-439 and HD-518