Recording equipment for student

["David Flores" <>]

I am curious if anyone could recommend some field recording equipment, digital 
disc recorder, for an individual interested in bioacoustics? The Edirol R-1 
model? I am looking for something affordable for a student, certainly less than 
$1000. A sampling rate allowing for recording of ultrasound is desirable. I 
have experience field recording with a minidisc recorder for non-scientific 
purposes, and I am getting ready to pursue some undergraduate research in 
bioacoustics.

Thanks,
David