You might consider...
If you can work with a 2-channel option (take a feed off a good stereo mix)you might want to consider a Marantz PMD 670 ($700). It has multiple sample rates (16 to 48kHz), 2 XLR inputs (mic or line level) and takes a Compact Flash card. You can record in mp3 (why, I have no idea), mp2, bwf, and wav formats.
OR - if you'd prefer to go to the next level...
You can get to the PMD 671, with 24-bit/96kHz resolution for around $1,000. Both models are USB compatible so you can transfer directly to your computer after you capture the audio.
Check 'em out if that's something like what you had in mind.
"A lack of preparation on your part does not constitute an emergency on my part."