Shit I got Beats, Bose, Sennhieser, Astromo, Creative, Ultrasone 750 and ultimate ears. I used to have a Skullcandy over ear too.
In all honesty, none of those sound any worse than the other. All HP's I've ever tested both in stores or friends..etc seem to either have their own signature or stay more flatter/neutral while the cheaper ones tend to be harsher or uncomfortable to listen to for extended periods. Bose is a little warmer than the Beats, Ultrasone's have weaker bass than both, Sennhieser and Astromo are fairly neutral and very similar.
I do notice that with amplification and/or if using a bass boost, most HP's distort pretty bad in the lowest frequencies, The Beats and Astromo's actually still handle it smoothly.