I stick to Creative Labs, Turtle Beach and then I carry a cheapie for emergency or testing. Here's the cheapie that is NOT going to cost much.
http://www.geeks.com/products_sc.asp?cat=762 (I have the current 7 dollar black one.)
I have a Dell C521 desktop with a bad integrated sound card and am looking for a new USB Sound Card. I was toying around with purchasing http://www.newegg.com/Product/Product.aspx?Item=N82E16829102020 which is a Creative Sound Blaster X-Fi Surround 5.1 SB1090 5.1 Channels 24-bit 96KHz USB Interface Sound Card.
Anyone have any suggestions?