I actually preferred Sony cans myself. I've got a pair of MDR-CD780's, they've been doing very well for about two years now. I tried a pair of sennheiser headphones and found them to have this tin-can muffled sound. I tried one of thier closed-end models, and even broke them in for a while, still sounded really weak. I did not like them at all. The ones I have are Closed-Back, Open-Front, with these really funky memory-foam earpads, which are exceptionally comfortable. I've found for my ears at least, that Sony headphones have a much brighter range of audio, crisp highs, and deep bass. I used to use the ever-popular MDR-V700DJ's but they were way too uncomfortable after about an hours use.
I've found though if you're going to buy headphones for quality and longevity, you're going to have to shell out over a hundred dollars, to get into the decent category.