[Vheissu]

So I gave away my pc speakers and am looking for a good pair of headphones. I'd like them to be comfortable for long periods of wear and open, or at least not entirely sound proof.  I listen to a lot of sludge metal and electronic music so it's important that the lower range feels substantial without getting all muddy.
 
So far I have tried the ath ad700's which were super comfortable and sounded excellent. This was at a show-room though, so I'm not sure how much I can trust the store's choice of music.
A friend let me try his sennheiser 515's as well. They felt okay, but I wasn't able to get a feel for their sound quality (he was playing call of duty at the time, which isn't exactly a benchmark for music.)
 
Also, I'll be driving the headphones with a sound card. I'm trying to find a decent deal using http://www.tomshardware.com/forum/279364-28-sound-cards-onboard-sounds-good as a guide, 
 
Any recommendations would be appreciated!

 

[1Time]

Welcome to Head-Fi. 
 
What's your budget for buying new headphones + a sound card? 
 
And, is this only for music or other uses?

 

[Vheissu]

Thank you.
 
I can spend up to 350 (canadian) in total. Unfortunately I've had a lot of issues with my motherboard's onboard sound drivers, so getting a new soundcard is a priority.
 
The headphones are meant mostly for music. I do spend some time gaming as well, but half of the time I just turn the sound down and listen to my own music instead.