I'm not sure if Rick sold his rig yet but,
Here's a link you maybe interested in...
Location recording rig for sale
If the Genex 9000 or Masterlink XL9600 HDs don't do it for you.
And tape based recording is truly your bag, the Tascam DA98HR & DA78HR DTRS recorders come to mind.
IMO, you should go with at least 8 tracks. It keeps your options open. Recorded various recording techniques, choose which setup works best later.