Those Sennheisers I got are good for that. They block out most everything but aren't completely isolated. I can't hear anything outside with the Sonys.
The only catch on the Senns is that they lack bass. That's not to say that it doesn't have bass, just that it's a very neutral sound. If you're playing rap or something that digs deep you'll get the bass, but if you're playing rock you might think that the headphones have no bass. This isn't true, it just doesn't have the bass cranked like a lot of headphones. The Sonys are kind of the same way, but if you've got them hooked up to a receiver and your playing a bass track those things can dig DEEP. Dracula X rocked my face the other day.
I can't speak for the other headphones, but between the two I really like the Sonys better for watching movies or gaming. I prefer the Sennheisers for music. The Senns are also a lot more comfortable for longer sessions and can sound reasonably good from a portable device. The Sonys really need some power to run well, they are great connected to my receiver but fall flat connected to my MP3 player, even with a headphone amp.