Maybe I missed something here, but why haven't you considered a CDR within a computer? For the $600 dollars that you will pay for a stand-alone burner, you could get an internal CD burner for your computer. Throw in Sound Forge, Wavelab or any 2-track editor (which are reasonably priced) and a reasonable sound card and you've got a system that can edit your material on a large, easily seen screen (your computer monitor). Plus you can always back up data from your hard drive to this same medium. Have you given any thought to a CD recorder for your computer?
Another thing about minidiscs. While they are better in sound quality than cassettes, minidiscs use a data compression algorithm to get data on the minidisc. So your sound is compromised in a way when you record to this medium. In my opinion, you would do better with a medium that recorded a MINIMUM of 16-bit 44.1 kHz UNCOMPRESSED (CD, DAT, hard disc). It would be even better if you had a medium that could record at 20 or 24 bits (hard disc with the right program, Alesis masterlink - pricey, etc).
E