An Affordable Pro-Quality Sound Card?

TFGeditor asks: "The company I work for is launching a pre-recorded radio program. I will be working with other staff (all in remote locations) to create the sound clips and then cobbling the show together (mixing). I will also interface with the co-host at a remote studio over the net via uber-broadband connection, producing our portion of the show as if we were in the same studio interacting with each other. What is the best sound card for the money (PC/XP) for this type of application?"