Hey guys, I'm looking for a 5.1 surround sound external usb card for use with my macbook. My macbook is a 5,1 aluminum macbook. I've been looking for some time and I freakin' can't find anything. Its getting frustrating. Everything I find isn't mac compatible. The only decent thing I found was the Creative Soundblaster X-Fi Surround 5.1 Pro USB. Its technically not compatible with mac though. Is there ANY equivalent card that works for mac? I need one that has the three green, black, and orange slots on them for my speaker system. Its a Logitech z506. (I also want something that I can adjust the levels of each speaker, because some of them are not loud enough at all) Any and all help would be REALLY great. Thanks.