Tascam has two models reasonably priced that do allow 4 tracks to be recorded. I'm thinking about getting one.
DR2d, DR100mki are both very interesting options.
DonM
Don, take a looks see if this helps:
http://www.youtube.com/watch?v=DYMWvYMgius
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Tyros 4/Pair SR 350/ PC with a i8 intel chip, XENYX 802, Ford Focus 2 litre/Tascam DR07/Brother printer/Designjet 500/ our Doris/5 Grandchildren/ white boxers short Kymart shipped over and Typhoo Tea Earl Grey