GPS Receivers?

An Anonymous Coward asks: "I need a GPS receiver for some field research, and am having some trouble finding one that meets my requirements. I need to have the coordinates and time recorded once per second for an extended period (12+ hours) with a decent accuracy (5 meters or so). Ideally, I'm looking for a device which will record real-time to my Dell notebook (running Windows XP), but I'd be okay with one that recorded into it's own memory as long as I could download to my Dell easily and: a) it has enough memory to save a days worth of data or b) it will save about an hours worth of points but is cheap enough that I can get two (so I can tag-team them). I'm working on a research budget, so the solution has to be under $800 (but less is better, or course). I thought a PCMCIA card receiver might be a good solution, but it seems like the stand-alone units have more to offer, so I'm open to either option."