The Roland R-26 audio field recorders captures audio with high-definition direct sound, as well as the rich natural ambience of the recording environment. The Roland R-26 has dual stereo mics, and six channels of simultaneous recording. The Roland R-26 is around $499. See also the Olympus LS-100 and the Tascam DR 100MKII and the handy Tascam iM2.
Thanks to prattarazzi for the Roland R26 demo:
Seed Roland for more information.