Newbie Audio Input Question, I need advice on simple audio input hardware. Options

Hi all. I'm new to all this, but learning rapidly. I want to be able to get 24bit audio at higher sample rates (not necessarily 96khz, but it might be nice) into my Mac. I'd like to find a PCI card that will allow me to do this. Here's the catch. That's all I want. No frills. No MIDI, no Samplers, no effects processors, no nothing. Just one or possibly two channels of high quality audio at a reasonable price. Every web search I do turns up amazing products, all of which do far more than I need and cost far more than I'm willing to spend. Any recommendations would be most appreciated.