I just picked up a pair of M-Audio BX5a D2s and now trying to find a good external audio sound card for my Macbook Pro. I am producing remixes mostly, and audio quality is very important. Any good suggestions? The ones I have been looking at are mostly for recording, but I need something that is...

I bought these headphones a while back because I wanted the best BT phones. Happy with them but I wanted better sound quality. You can hardwire them and they sound amazing. I want to know if I can amp these using the cable. I have a Fiio E7, but since it is bluetooth I don't know if they are...