recommend voice recorder

Archived from groups: rec.audio.tech (More info?)

I require voice recorder:
- to record voice conversations (I don't need very good sound
quality, but clear enough to understand)
- that can be used discretely (i imagine i should be a digital one,
with quite buttons and external microphone)
- which automatically switch off if there is no sound input while in
recording mode and starts recording again when there is sound input
- not too expensive (preferably less than $100)

Please recommend a good value one.
Thank you!