For my money, if I was in John's shoes, I'd be getting
this.
Hold up on the Beri-bashing...almost 1/3 the cost of the M-Audio unit, I/O on more durable RCA jacks, dedicated headphone circuit...lots of functional software and VI downloads centralized at the Behringer site, etc. (including Audacity, which BTW John, use Audacity...that is a great suggestion from Avieth, and I believe there is good user forum support for that application) Yes it is only 16-bit and up to 48kHz, but it'll do loads better than an onboard or PCI soundcard.
I've used one of these and it worked great for relatively little dosh.