I'm still trying to get info on the Fostex MR-8. This uses CompactFlash storage and is the next level "down" the price range (and capability) from your list. Definately portable, though, and you are doing the sort of things I'm thinking of.

dnj was kind enough to point me at this review of the Fostex:
http://www.musiciansfriend.com/srs7/sid=...ts/doc_id=90893