Or...
Skip the sound card altogether and spend some time sourcing a cheap AVR and 5 retro hi-fi speakers; much better quality, a lot cheaper and has other advantages such as being able to connect to other devices easily. I've done the same thing and spent around £130 on my setup, once my replacement speaker arrives it'll be complete and at that price the quality is unbeatable!
I really doubt you'll be getting that good quality for the price.