Hello,
That's an impressive range of Taunt ware

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The M40 is another deck I'd like, but I am not as keen on Sanyos Beta offerings, they seemed to take their own approach to the standard, their machines also have a slightly cheaper feel, though the 6500 is okay if a little brash looking.
I found that Sanyo Beta machines had a problem copying Macrovision protected VHS tapes to Betamax, on Sony and toshiba decks, the AGC would wipe out the macrovision signal, thus allowing you to 'back up' Macrovision protected VHS cassettes to Betamax......apparently.
The duplicator sounds a nice bit of kit....
Another weird item I have in my collection is this Sony device that takes photo negatives and basically turns them into a video signal that is then recorded onto a betamax cassette, allowing you to put your photo collection onto Betamax. A very primative Video CD if you will.
I have a waterproof back and strap for my F1 so I can take it out and about if I so desired.
Tape collection wise, I've got around 3-400 cassettes with varying films including Star Wars on Betamax, and a cased copy of Back To the Future

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I sometimes think about selling my whole collection, but probably never will as I found the whole format facinating. It's suprising how much of a following Betamax has, 950's sometimes pop up on ebay, and you won't get much change from £250. As I keep saying, their the modern, valueable antique.
James